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HTML

              
                <div class="header">
   <a href="http://pukka.io/" class="name">pukka</a>
   <a href="/contact" class="contact">contact</a>
</div>

<div class="hero" id="particles-js">
   <div class="w wave"></div>
   <div class="w wave2"></div>
   <div class="w wave3"></div>
   <div class="w wave4"></div>
</div>
              
            
!

CSS

              
                body {
   min-height:200vh;
   margin:0;
   font-family: 'Quicksand', sans-serif;
   overflow-x:hidden;
   a {
      color:inherit;
      text-decoration:none;
   }
   .header {
      z-index:1000;
      position: fixed;
      top:0px;
      left:0px;
      right:0px;
      padding:10px 20px;
      background: linear-gradient(100deg, rgba(36,164,234, 0), rgba(55,157,235,0) 25%, rgba(183,107,240,0));
      transition:background .25s ease;
      .name, .contact {
         display:inline-block;
         color:white;
         font-size:24px;
         line-height:42px;
         font-smoothing: antialiased;
      }
      .name {
         font-weight:bold;
      }
      .contact {
         float:right;
      }
      &.bg {
         background: linear-gradient(100deg, #24A4EA, #379DEB 25%, #B76BF0);
      }
   }
   .hero {
      overflow: hidden;
      position: relative;
      height:calc(50vh + 80px);
      min-height:200px;
      background: #ffce54;
      background: linear-gradient(100deg, #24A4EA, #379DEB 25%, #B76BF0);
      .w {
         position: absolute;
         top:100%;
         left:-25vw;
         right:0px;
         background:url(https://i.koya.io/whitewave2.svg);
         background-position:center;
      }
      .wave {
         height:200px;
         transform:translateY(-40px);
      }
      .wave2 {
         height:240px;
         transform:translateY(-80px);
         background-size:960px 240px;
         opacity:0.5;
         left:-80vw;
         right:-5vw;
      }
      .wave3 {
         height:220px;
         transform:translateY(-120px);
         background-size:880px 220px;
         opacity:0.33;
         left:0vw;
         right:-20vw;
      }
      .wave4 {
         height:280px;
         transform:translateY(-160px);
         background-size:1120px 280px;
         opacity:0.1;
         left:0vw;
         right:-40vw;
      }
   }
}
              
            
!

JS

              
                console.clear();

$(window).scroll(function(){
   if($(window).scrollTop() - $(".hero").scrollTop() - $(".hero").height() >= -120) {
      $(".header").addClass("bg");
   } else {
      $(".header").removeClass("bg");
   }
});

/* -----------------------------------------------
/* Author : Vincent Garreau  - vincentgarreau.com
/* MIT license: https://opensource.org/licenses/MIT
/* Demo / Generator : vincentgarreau.com/particles.js
/* GitHub : github.com/VincentGarreau/particles.js
/* How to use? : Check the GitHub README
/* v2.0.0
/* ----------------------------------------------- */

var pJS = function(tag_id, params) {

   var canvas_el = document.querySelector('#' + tag_id + ' > .particles-js-canvas-el');

   /* particles.js variables with default values */
   this.pJS = {
      canvas: {
         el: canvas_el,
         w: canvas_el.offsetWidth,
         h: canvas_el.offsetHeight
      },
      particles: {
         number: {
            value: 400,
            density: {
               enable: true,
               value_area: 800
            }
         },
         color: {
            value: '#fff'
         },
         shape: {
            type: 'circle',
            stroke: {
               width: 0,
               color: '#ff0000'
            },
            polygon: {
               nb_sides: 5
            },
            image: {
               src: '',
               width: 100,
               height: 100
            }
         },
         opacity: {
            value: 1,
            random: false,
            anim: {
               enable: false,
               speed: 2,
               opacity_min: 0,
               sync: false
            }
         },
         size: {
            value: 20,
            random: false,
            anim: {
               enable: false,
               speed: 20,
               size_min: 0,
               sync: false
            }
         },
         line_linked: {
            enable: true,
            distance: 100,
            color: '#fff',
            opacity: 1,
            width: 1
         },
         move: {
            enable: true,
            speed: 2,
            direction: 'none',
            random: false,
            straight: false,
            out_mode: 'out',
            bounce: false,
            attract: {
               enable: false,
               rotateX: 3000,
               rotateY: 3000
            }
         },
         array: []
      },
      interactivity: {
         detect_on: 'canvas',
         events: {
            onhover: {
               enable: true,
               mode: 'grab'
            },
            onclick: {
               enable: true,
               mode: 'push'
            },
            resize: true
         },
         modes: {
            grab: {
               distance: 100,
               line_linked: {
                  opacity: 1
               }
            },
            bubble: {
               distance: 200,
               size: 80,
               duration: 0.4
            },
            repulse: {
               distance: 200,
               duration: 0.4
            },
            push: {
               particles_nb: 4
            },
            remove: {
               particles_nb: 2
            }
         },
         mouse: {}
      },
      retina_detect: false,
      fn: {
         interact: {},
         modes: {},
         vendors: {}
      },
      tmp: {}
   };

   var pJS = this.pJS;

   /* params settings */
   if (params) {
      Object.deepExtend(pJS, params);
   }

   pJS.tmp.obj = {
      size_value: pJS.particles.size.value,
      size_anim_speed: pJS.particles.size.anim.speed,
      move_speed: pJS.particles.move.speed,
      line_linked_distance: pJS.particles.line_linked.distance,
      line_linked_width: pJS.particles.line_linked.width,
      mode_grab_distance: pJS.interactivity.modes.grab.distance,
      mode_bubble_distance: pJS.interactivity.modes.bubble.distance,
      mode_bubble_size: pJS.interactivity.modes.bubble.size,
      mode_repulse_distance: pJS.interactivity.modes.repulse.distance
   };

   pJS.fn.retinaInit = function() {

      if (pJS.retina_detect && window.devicePixelRatio > 1) {
         pJS.canvas.pxratio = window.devicePixelRatio;
         pJS.tmp.retina = true;
      } else {
         pJS.canvas.pxratio = 1;
         pJS.tmp.retina = false;
      }

      pJS.canvas.w = pJS.canvas.el.offsetWidth * pJS.canvas.pxratio;
      pJS.canvas.h = pJS.canvas.el.offsetHeight * pJS.canvas.pxratio;

      pJS.particles.size.value = pJS.tmp.obj.size_value * pJS.canvas.pxratio;
      pJS.particles.size.anim.speed = pJS.tmp.obj.size_anim_speed * pJS.canvas.pxratio;
      pJS.particles.move.speed = pJS.tmp.obj.move_speed * pJS.canvas.pxratio;
      pJS.particles.line_linked.distance = pJS.tmp.obj.line_linked_distance * pJS.canvas.pxratio;
      pJS.interactivity.modes.grab.distance = pJS.tmp.obj.mode_grab_distance * pJS.canvas.pxratio;
      pJS.interactivity.modes.bubble.distance = pJS.tmp.obj.mode_bubble_distance * pJS.canvas.pxratio;
      pJS.particles.line_linked.width = pJS.tmp.obj.line_linked_width * pJS.canvas.pxratio;
      pJS.interactivity.modes.bubble.size = pJS.tmp.obj.mode_bubble_size * pJS.canvas.pxratio;
      pJS.interactivity.modes.repulse.distance = pJS.tmp.obj.mode_repulse_distance * pJS.canvas.pxratio;

   };

   /* ---------- pJS functions - canvas ------------ */

   pJS.fn.canvasInit = function() {
      pJS.canvas.ctx = pJS.canvas.el.getContext('2d');
   };

   pJS.fn.canvasSize = function() {

      pJS.canvas.el.width = pJS.canvas.w;
      pJS.canvas.el.height = pJS.canvas.h;

      if (pJS && pJS.interactivity.events.resize) {

         window.addEventListener('resize', function() {

            pJS.canvas.w = pJS.canvas.el.offsetWidth;
            pJS.canvas.h = pJS.canvas.el.offsetHeight;

            /* resize canvas */
            if (pJS.tmp.retina) {
               pJS.canvas.w *= pJS.canvas.pxratio;
               pJS.canvas.h *= pJS.canvas.pxratio;
            }

            pJS.canvas.el.width = pJS.canvas.w;
            pJS.canvas.el.height = pJS.canvas.h;

            /* repaint canvas on anim disabled */
            if (!pJS.particles.move.enable) {
               pJS.fn.particlesEmpty();
               pJS.fn.particlesCreate();
               pJS.fn.particlesDraw();
               pJS.fn.vendors.densityAutoParticles();
            }

            /* density particles enabled */
            pJS.fn.vendors.densityAutoParticles();

         });

      }

   };

   pJS.fn.canvasPaint = function() {
      pJS.canvas.ctx.fillRect(0, 0, pJS.canvas.w, pJS.canvas.h);
   };

   pJS.fn.canvasClear = function() {
      pJS.canvas.ctx.clearRect(0, 0, pJS.canvas.w, pJS.canvas.h);
   };

   /* --------- pJS functions - particles ----------- */

   pJS.fn.particle = function(color, opacity, position) {

      /* size */
      this.radius = (pJS.particles.size.random ? Math.random() : 1) * pJS.particles.size.value;
      if (pJS.particles.size.anim.enable) {
         this.size_status = false;
         this.vs = pJS.particles.size.anim.speed / 100;
         if (!pJS.particles.size.anim.sync) {
            this.vs = this.vs * Math.random();
         }
      }

      /* position */
      this.x = position ? position.x : Math.random() * pJS.canvas.w;
      this.y = position ? position.y : Math.random() * pJS.canvas.h;

      /* check position  - into the canvas */
      if (this.x > pJS.canvas.w - this.radius * 2) this.x = this.x - this.radius;
      else if (this.x < this.radius * 2) this.x = this.x + this.radius;
      if (this.y > pJS.canvas.h - this.radius * 2) this.y = this.y - this.radius;
      else if (this.y < this.radius * 2) this.y = this.y + this.radius;

      /* check position - avoid overlap */
      if (pJS.particles.move.bounce) {
         pJS.fn.vendors.checkOverlap(this, position);
      }

      /* color */
      this.color = {};
      if (typeof(color.value) == 'object') {

         if (color.value instanceof Array) {
            var color_selected = color.value[Math.floor(Math.random() * pJS.particles.color.value.length)];
            this.color.rgb = hexToRgb(color_selected);
         } else {
            if (color.value.r != undefined && color.value.g != undefined && color.value.b != undefined) {
               this.color.rgb = {
                  r: color.value.r,
                  g: color.value.g,
                  b: color.value.b
               }
            }
            if (color.value.h != undefined && color.value.s != undefined && color.value.l != undefined) {
               this.color.hsl = {
                  h: color.value.h,
                  s: color.value.s,
                  l: color.value.l
               }
            }
         }

      } else if (color.value == 'random') {
         this.color.rgb = {
            r: (Math.floor(Math.random() * (255 - 0 + 1)) + 0),
            g: (Math.floor(Math.random() * (255 - 0 + 1)) + 0),
            b: (Math.floor(Math.random() * (255 - 0 + 1)) + 0)
         }
      } else if (typeof(color.value) == 'string') {
         this.color = color;
         this.color.rgb = hexToRgb(this.color.value);
      }

      /* opacity */
      this.opacity = (pJS.particles.opacity.random ? Math.random() : 1) * pJS.particles.opacity.value;
      if (pJS.particles.opacity.anim.enable) {
         this.opacity_status = false;
         this.vo = pJS.particles.opacity.anim.speed / 100;
         if (!pJS.particles.opacity.anim.sync) {
            this.vo = this.vo * Math.random();
         }
      }

      /* animation - velocity for speed */
      var velbase = {}
      switch (pJS.particles.move.direction) {
         case 'top':
            velbase = {
               x: 0,
               y: -1
            };
            break;
         case 'top-right':
            velbase = {
               x: 0.5,
               y: -0.5
            };
            break;
         case 'right':
            velbase = {
               x: 1,
               y: -0
            };
            break;
         case 'bottom-right':
            velbase = {
               x: 0.5,
               y: 0.5
            };
            break;
         case 'bottom':
            velbase = {
               x: 0,
               y: 1
            };
            break;
         case 'bottom-left':
            velbase = {
               x: -0.5,
               y: 1
            };
            break;
         case 'left':
            velbase = {
               x: -1,
               y: 0
            };
            break;
         case 'top-left':
            velbase = {
               x: -0.5,
               y: -0.5
            };
            break;
         default:
            velbase = {
               x: 0,
               y: 0
            };
            break;
      }

      if (pJS.particles.move.straight) {
         this.vx = velbase.x;
         this.vy = velbase.y;
         if (pJS.particles.move.random) {
            this.vx = this.vx * (Math.random());
            this.vy = this.vy * (Math.random());
         }
      } else {
         this.vx = velbase.x + Math.random() - 0.5;
         this.vy = velbase.y + Math.random() - 0.5;
      }

      // var theta = 2.0 * Math.PI * Math.random();
      // this.vx = Math.cos(theta);
      // this.vy = Math.sin(theta);

      this.vx_i = this.vx;
      this.vy_i = this.vy;

      /* if shape is image */

      var shape_type = pJS.particles.shape.type;
      if (typeof(shape_type) == 'object') {
         if (shape_type instanceof Array) {
            var shape_selected = shape_type[Math.floor(Math.random() * shape_type.length)];
            this.shape = shape_selected;
         }
      } else {
         this.shape = shape_type;
      }

      if (this.shape == 'image') {
         var sh = pJS.particles.shape;
         this.img = {
            src: sh.image.src,
            ratio: sh.image.width / sh.image.height
         }
         if (!this.img.ratio) this.img.ratio = 1;
         if (pJS.tmp.img_type == 'svg' && pJS.tmp.source_svg != undefined) {
            pJS.fn.vendors.createSvgImg(this);
            if (pJS.tmp.pushing) {
               this.img.loaded = false;
            }
         }
      }

   };

   pJS.fn.particle.prototype.draw = function() {

      var p = this;

      if (p.radius_bubble != undefined) {
         var radius = p.radius_bubble;
      } else {
         var radius = p.radius;
      }

      if (p.opacity_bubble != undefined) {
         var opacity = p.opacity_bubble;
      } else {
         var opacity = p.opacity;
      }

      if (p.color.rgb) {
         var color_value = 'rgba(' + p.color.rgb.r + ',' + p.color.rgb.g + ',' + p.color.rgb.b + ',' + opacity + ')';
      } else {
         var color_value = 'hsla(' + p.color.hsl.h + ',' + p.color.hsl.s + '%,' + p.color.hsl.l + '%,' + opacity + ')';
      }

      pJS.canvas.ctx.fillStyle = color_value;
      pJS.canvas.ctx.beginPath();

      switch (p.shape) {

         case 'circle':
            pJS.canvas.ctx.arc(p.x, p.y, radius, 0, Math.PI * 2, false);
            break;

         case 'edge':
            pJS.canvas.ctx.rect(p.x - radius, p.y - radius, radius * 2, radius * 2);
            break;

         case 'triangle':
            pJS.fn.vendors.drawShape(pJS.canvas.ctx, p.x - radius, p.y + radius / 1.66, radius * 2, 3, 2);
            break;

         case 'polygon':
            pJS.fn.vendors.drawShape(
               pJS.canvas.ctx,
               p.x - radius / (pJS.particles.shape.polygon.nb_sides / 3.5), // startX
               p.y - radius / (2.66 / 3.5), // startY
               radius * 2.66 / (pJS.particles.shape.polygon.nb_sides / 3), // sideLength
               pJS.particles.shape.polygon.nb_sides, // sideCountNumerator
               1 // sideCountDenominator
            );
            break;

         case 'star':
            pJS.fn.vendors.drawShape(
               pJS.canvas.ctx,
               p.x - radius * 2 / (pJS.particles.shape.polygon.nb_sides / 4), // startX
               p.y - radius / (2 * 2.66 / 3.5), // startY
               radius * 2 * 2.66 / (pJS.particles.shape.polygon.nb_sides / 3), // sideLength
               pJS.particles.shape.polygon.nb_sides, // sideCountNumerator
               2 // sideCountDenominator
            );
            break;

         case 'image':

            function draw() {
               pJS.canvas.ctx.drawImage(
                  img_obj,
                  p.x - radius,
                  p.y - radius,
                  radius * 2,
                  radius * 2 / p.img.ratio
               );
            }

            if (pJS.tmp.img_type == 'svg') {
               var img_obj = p.img.obj;
            } else {
               var img_obj = pJS.tmp.img_obj;
            }

            if (img_obj) {
               draw();
            }

            break;

      }

      pJS.canvas.ctx.closePath();

      if (pJS.particles.shape.stroke.width > 0) {
         pJS.canvas.ctx.strokeStyle = pJS.particles.shape.stroke.color;
         pJS.canvas.ctx.lineWidth = pJS.particles.shape.stroke.width;
         pJS.canvas.ctx.stroke();
      }

      pJS.canvas.ctx.fill();

   };

   pJS.fn.particlesCreate = function() {
      for (var i = 0; i < pJS.particles.number.value; i++) {
         pJS.particles.array.push(new pJS.fn.particle(pJS.particles.color, pJS.particles.opacity.value));
      }
   };

   pJS.fn.particlesUpdate = function() {

      for (var i = 0; i < pJS.particles.array.length; i++) {

         /* the particle */
         var p = pJS.particles.array[i];

         // var d = ( dx = pJS.interactivity.mouse.click_pos_x - p.x ) * dx + ( dy = pJS.interactivity.mouse.click_pos_y - p.y ) * dy;
         // var f = -BANG_SIZE / d;
         // if ( d < BANG_SIZE ) {
         //     var t = Math.atan2( dy, dx );
         //     p.vx = f * Math.cos(t);
         //     p.vy = f * Math.sin(t);
         // }

         /* move the particle */
         if (pJS.particles.move.enable) {
            var ms = pJS.particles.move.speed / 2;
            p.x += p.vx * ms;
            p.y += p.vy * ms;
         }

         /* change opacity status */
         if (pJS.particles.opacity.anim.enable) {
            if (p.opacity_status == true) {
               if (p.opacity >= pJS.particles.opacity.value) p.opacity_status = false;
               p.opacity += p.vo;
            } else {
               if (p.opacity <= pJS.particles.opacity.anim.opacity_min) p.opacity_status = true;
               p.opacity -= p.vo;
            }
            if (p.opacity < 0) p.opacity = 0;
         }

         /* change size */
         if (pJS.particles.size.anim.enable) {
            if (p.size_status == true) {
               if (p.radius >= pJS.particles.size.value) p.size_status = false;
               p.radius += p.vs;
            } else {
               if (p.radius <= pJS.particles.size.anim.size_min) p.size_status = true;
               p.radius -= p.vs;
            }
            if (p.radius < 0) p.radius = 0;
         }

         /* change particle position if it is out of canvas */
         if (pJS.particles.move.out_mode == 'bounce') {
            var new_pos = {
               x_left: p.radius,
               x_right: pJS.canvas.w,
               y_top: p.radius,
               y_bottom: pJS.canvas.h
            }
         } else {
            var new_pos = {
               x_left: -p.radius,
               x_right: pJS.canvas.w + p.radius,
               y_top: -p.radius,
               y_bottom: pJS.canvas.h + p.radius
            }
         }

         if (p.x - p.radius > pJS.canvas.w) {
            p.x = new_pos.x_left;
            p.y = Math.random() * pJS.canvas.h;
         } else if (p.x + p.radius < 0) {
            p.x = new_pos.x_right;
            p.y = Math.random() * pJS.canvas.h;
         }
         if (p.y - p.radius > pJS.canvas.h) {
            p.y = new_pos.y_top;
            p.x = Math.random() * pJS.canvas.w;
         } else if (p.y + p.radius < 0) {
            p.y = new_pos.y_bottom;
            p.x = Math.random() * pJS.canvas.w;
         }

         /* out of canvas modes */
         switch (pJS.particles.move.out_mode) {
            case 'bounce':
               if (p.x + p.radius > pJS.canvas.w) p.vx = -p.vx;
               else if (p.x - p.radius < 0) p.vx = -p.vx;
               if (p.y + p.radius > pJS.canvas.h) p.vy = -p.vy;
               else if (p.y - p.radius < 0) p.vy = -p.vy;
               break;
         }

         /* events */
         if (isInArray('grab', pJS.interactivity.events.onhover.mode)) {
            pJS.fn.modes.grabParticle(p);
         }

         if (isInArray('bubble', pJS.interactivity.events.onhover.mode) || isInArray('bubble', pJS.interactivity.events.onclick.mode)) {
            pJS.fn.modes.bubbleParticle(p);
         }

         if (isInArray('repulse', pJS.interactivity.events.onhover.mode) || isInArray('repulse', pJS.interactivity.events.onclick.mode)) {
            pJS.fn.modes.repulseParticle(p);
         }

         /* interaction auto between particles */
         if (pJS.particles.line_linked.enable || pJS.particles.move.attract.enable) {
            for (var j = i + 1; j < pJS.particles.array.length; j++) {
               var p2 = pJS.particles.array[j];

               /* link particles */
               if (pJS.particles.line_linked.enable) {
                  pJS.fn.interact.linkParticles(p, p2);
               }

               /* attract particles */
               if (pJS.particles.move.attract.enable) {
                  pJS.fn.interact.attractParticles(p, p2);
               }

               /* bounce particles */
               if (pJS.particles.move.bounce) {
                  pJS.fn.interact.bounceParticles(p, p2);
               }

            }
         }

      }

   };

   pJS.fn.particlesDraw = function() {

      /* clear canvas */
      pJS.canvas.ctx.clearRect(0, 0, pJS.canvas.w, pJS.canvas.h);

      /* update each particles param */
      pJS.fn.particlesUpdate();

      /* draw each particle */
      for (var i = 0; i < pJS.particles.array.length; i++) {
         var p = pJS.particles.array[i];
         p.draw();
      }

   };

   pJS.fn.particlesEmpty = function() {
      pJS.particles.array = [];
   };

   pJS.fn.particlesRefresh = function() {

      /* init all */
      cancelRequestAnimFrame(pJS.fn.checkAnimFrame);
      cancelRequestAnimFrame(pJS.fn.drawAnimFrame);
      pJS.tmp.source_svg = undefined;
      pJS.tmp.img_obj = undefined;
      pJS.tmp.count_svg = 0;
      pJS.fn.particlesEmpty();
      pJS.fn.canvasClear();

      /* restart */
      pJS.fn.vendors.start();

   };

   /* ---------- pJS functions - particles interaction ------------ */

   pJS.fn.interact.linkParticles = function(p1, p2) {

      var dx = p1.x - p2.x,
         dy = p1.y - p2.y,
         dist = Math.sqrt(dx * dx + dy * dy);

      /* draw a line between p1 and p2 if the distance between them is under the config distance */
      if (dist <= pJS.particles.line_linked.distance) {

         var opacity_line = pJS.particles.line_linked.opacity - (dist / (1 / pJS.particles.line_linked.opacity)) / pJS.particles.line_linked.distance;

         if (opacity_line > 0) {

            /* style */
            var color_line = pJS.particles.line_linked.color_rgb_line;
            pJS.canvas.ctx.strokeStyle = 'rgba(' + color_line.r + ',' + color_line.g + ',' + color_line.b + ',' + opacity_line + ')';
            pJS.canvas.ctx.lineWidth = pJS.particles.line_linked.width;
            //pJS.canvas.ctx.lineCap = 'round'; /* performance issue */

            /* path */
            pJS.canvas.ctx.beginPath();
            pJS.canvas.ctx.moveTo(p1.x, p1.y);
            pJS.canvas.ctx.lineTo(p2.x, p2.y);
            pJS.canvas.ctx.stroke();
            pJS.canvas.ctx.closePath();

         }

      }

   };

   pJS.fn.interact.attractParticles = function(p1, p2) {

      /* condensed particles */
      var dx = p1.x - p2.x,
         dy = p1.y - p2.y,
         dist = Math.sqrt(dx * dx + dy * dy);

      if (dist <= pJS.particles.line_linked.distance) {

         var ax = dx / (pJS.particles.move.attract.rotateX * 1000),
            ay = dy / (pJS.particles.move.attract.rotateY * 1000);

         p1.vx -= ax;
         p1.vy -= ay;

         p2.vx += ax;
         p2.vy += ay;

      }

   }

   pJS.fn.interact.bounceParticles = function(p1, p2) {

      var dx = p1.x - p2.x,
         dy = p1.y - p2.y,
         dist = Math.sqrt(dx * dx + dy * dy),
         dist_p = p1.radius + p2.radius;

      if (dist <= dist_p) {
         p1.vx = -p1.vx;
         p1.vy = -p1.vy;

         p2.vx = -p2.vx;
         p2.vy = -p2.vy;
      }

   }

   /* ---------- pJS functions - modes events ------------ */

   pJS.fn.modes.pushParticles = function(nb, pos) {

      pJS.tmp.pushing = true;

      for (var i = 0; i < nb; i++) {
         pJS.particles.array.push(
            new pJS.fn.particle(
               pJS.particles.color,
               pJS.particles.opacity.value, {
                  'x': pos ? pos.pos_x : Math.random() * pJS.canvas.w,
                  'y': pos ? pos.pos_y : Math.random() * pJS.canvas.h
               }
            )
         )
         if (i == nb - 1) {
            if (!pJS.particles.move.enable) {
               pJS.fn.particlesDraw();
            }
            pJS.tmp.pushing = false;
         }
      }

   };

   pJS.fn.modes.removeParticles = function(nb) {

      pJS.particles.array.splice(0, nb);
      if (!pJS.particles.move.enable) {
         pJS.fn.particlesDraw();
      }

   };

   pJS.fn.modes.bubbleParticle = function(p) {

      /* on hover event */
      if (pJS.interactivity.events.onhover.enable && isInArray('bubble', pJS.interactivity.events.onhover.mode)) {

         var dx_mouse = p.x - pJS.interactivity.mouse.pos_x,
            dy_mouse = p.y - pJS.interactivity.mouse.pos_y,
            dist_mouse = Math.sqrt(dx_mouse * dx_mouse + dy_mouse * dy_mouse),
            ratio = 1 - dist_mouse / pJS.interactivity.modes.bubble.distance;

         function init() {
            p.opacity_bubble = p.opacity;
            p.radius_bubble = p.radius;
         }

         /* mousemove - check ratio */
         if (dist_mouse <= pJS.interactivity.modes.bubble.distance) {

            if (ratio >= 0 && pJS.interactivity.status == 'mousemove') {

               /* size */
               if (pJS.interactivity.modes.bubble.size != pJS.particles.size.value) {

                  if (pJS.interactivity.modes.bubble.size > pJS.particles.size.value) {
                     var size = p.radius + (pJS.interactivity.modes.bubble.size * ratio);
                     if (size >= 0) {
                        p.radius_bubble = size;
                     }
                  } else {
                     var dif = p.radius - pJS.interactivity.modes.bubble.size,
                        size = p.radius - (dif * ratio);
                     if (size > 0) {
                        p.radius_bubble = size;
                     } else {
                        p.radius_bubble = 0;
                     }
                  }

               }

               /* opacity */
               if (pJS.interactivity.modes.bubble.opacity != pJS.particles.opacity.value) {

                  if (pJS.interactivity.modes.bubble.opacity > pJS.particles.opacity.value) {
                     var opacity = pJS.interactivity.modes.bubble.opacity * ratio;
                     if (opacity > p.opacity && opacity <= pJS.interactivity.modes.bubble.opacity) {
                        p.opacity_bubble = opacity;
                     }
                  } else {
                     var opacity = p.opacity - (pJS.particles.opacity.value - pJS.interactivity.modes.bubble.opacity) * ratio;
                     if (opacity < p.opacity && opacity >= pJS.interactivity.modes.bubble.opacity) {
                        p.opacity_bubble = opacity;
                     }
                  }

               }

            }

         } else {
            init();
         }

         /* mouseleave */
         if (pJS.interactivity.status == 'mouseleave') {
            init();
         }

      }

      /* on click event */
      else if (pJS.interactivity.events.onclick.enable && isInArray('bubble', pJS.interactivity.events.onclick.mode)) {

         if (pJS.tmp.bubble_clicking) {
            var dx_mouse = p.x - pJS.interactivity.mouse.click_pos_x,
               dy_mouse = p.y - pJS.interactivity.mouse.click_pos_y,
               dist_mouse = Math.sqrt(dx_mouse * dx_mouse + dy_mouse * dy_mouse),
               time_spent = (new Date().getTime() - pJS.interactivity.mouse.click_time) / 1000;

            if (time_spent > pJS.interactivity.modes.bubble.duration) {
               pJS.tmp.bubble_duration_end = true;
            }

            if (time_spent > pJS.interactivity.modes.bubble.duration * 2) {
               pJS.tmp.bubble_clicking = false;
               pJS.tmp.bubble_duration_end = false;
            }
         }

         function process(bubble_param, particles_param, p_obj_bubble, p_obj, id) {

            if (bubble_param != particles_param) {

               if (!pJS.tmp.bubble_duration_end) {
                  if (dist_mouse <= pJS.interactivity.modes.bubble.distance) {
                     if (p_obj_bubble != undefined) var obj = p_obj_bubble;
                     else var obj = p_obj;
                     if (obj != bubble_param) {
                        var value = p_obj - (time_spent * (p_obj - bubble_param) / pJS.interactivity.modes.bubble.duration);
                        if (id == 'size') p.radius_bubble = value;
                        if (id == 'opacity') p.opacity_bubble = value;
                     }
                  } else {
                     if (id == 'size') p.radius_bubble = undefined;
                     if (id == 'opacity') p.opacity_bubble = undefined;
                  }
               } else {
                  if (p_obj_bubble != undefined) {
                     var value_tmp = p_obj - (time_spent * (p_obj - bubble_param) / pJS.interactivity.modes.bubble.duration),
                        dif = bubble_param - value_tmp;
                     value = bubble_param + dif;
                     if (id == 'size') p.radius_bubble = value;
                     if (id == 'opacity') p.opacity_bubble = value;
                  }
               }

            }

         }

         if (pJS.tmp.bubble_clicking) {
            /* size */
            process(pJS.interactivity.modes.bubble.size, pJS.particles.size.value, p.radius_bubble, p.radius, 'size');
            /* opacity */
            process(pJS.interactivity.modes.bubble.opacity, pJS.particles.opacity.value, p.opacity_bubble, p.opacity, 'opacity');
         }

      }

   };

   pJS.fn.modes.repulseParticle = function(p) {

      if (pJS.interactivity.events.onhover.enable && isInArray('repulse', pJS.interactivity.events.onhover.mode) && pJS.interactivity.status == 'mousemove') {

         var dx_mouse = p.x - pJS.interactivity.mouse.pos_x,
            dy_mouse = p.y - pJS.interactivity.mouse.pos_y,
            dist_mouse = Math.sqrt(dx_mouse * dx_mouse + dy_mouse * dy_mouse);

         var normVec = {
               x: dx_mouse / dist_mouse,
               y: dy_mouse / dist_mouse
            },
            repulseRadius = pJS.interactivity.modes.repulse.distance,
            velocity = 100,
            repulseFactor = clamp((1 / repulseRadius) * (-1 * Math.pow(dist_mouse / repulseRadius, 2) + 1) * repulseRadius * velocity, 0, 50);

         var pos = {
            x: p.x + normVec.x * repulseFactor,
            y: p.y + normVec.y * repulseFactor
         }

         if (pJS.particles.move.out_mode == 'bounce') {
            if (pos.x - p.radius > 0 && pos.x + p.radius < pJS.canvas.w) p.x = pos.x;
            if (pos.y - p.radius > 0 && pos.y + p.radius < pJS.canvas.h) p.y = pos.y;
         } else {
            p.x = pos.x;
            p.y = pos.y;
         }

      } else if (pJS.interactivity.events.onclick.enable && isInArray('repulse', pJS.interactivity.events.onclick.mode)) {

         if (!pJS.tmp.repulse_finish) {
            pJS.tmp.repulse_count++;
            if (pJS.tmp.repulse_count == pJS.particles.array.length) {
               pJS.tmp.repulse_finish = true;
            }
         }

         if (pJS.tmp.repulse_clicking) {

            var repulseRadius = Math.pow(pJS.interactivity.modes.repulse.distance / 6, 3);

            var dx = pJS.interactivity.mouse.click_pos_x - p.x,
               dy = pJS.interactivity.mouse.click_pos_y - p.y,
               d = dx * dx + dy * dy;

            var force = -repulseRadius / d * 1;

            function process() {

               var f = Math.atan2(dy, dx);
               p.vx = force * Math.cos(f);
               p.vy = force * Math.sin(f);

               if (pJS.particles.move.out_mode == 'bounce') {
                  var pos = {
                     x: p.x + p.vx,
                     y: p.y + p.vy
                  }
                  if (pos.x + p.radius > pJS.canvas.w) p.vx = -p.vx;
                  else if (pos.x - p.radius < 0) p.vx = -p.vx;
                  if (pos.y + p.radius > pJS.canvas.h) p.vy = -p.vy;
                  else if (pos.y - p.radius < 0) p.vy = -p.vy;
               }

            }

            // default
            if (d <= repulseRadius) {
               process();
            }

            // bang - slow motion mode
            // if(!pJS.tmp.repulse_finish){
            //   if(d <= repulseRadius){
            //     process();
            //   }
            // }else{
            //   process();
            // }

         } else {

            if (pJS.tmp.repulse_clicking == false) {

               p.vx = p.vx_i;
               p.vy = p.vy_i;

            }

         }

      }

   }

   pJS.fn.modes.grabParticle = function(p) {

      if (pJS.interactivity.events.onhover.enable && pJS.interactivity.status == 'mousemove') {

         var dx_mouse = p.x - pJS.interactivity.mouse.pos_x,
            dy_mouse = p.y - pJS.interactivity.mouse.pos_y,
            dist_mouse = Math.sqrt(dx_mouse * dx_mouse + dy_mouse * dy_mouse);

         /* draw a line between the cursor and the particle if the distance between them is under the config distance */
         if (dist_mouse <= pJS.interactivity.modes.grab.distance) {

            var opacity_line = pJS.interactivity.modes.grab.line_linked.opacity - (dist_mouse / (1 / pJS.interactivity.modes.grab.line_linked.opacity)) / pJS.interactivity.modes.grab.distance;

            if (opacity_line > 0) {

               /* style */
               var color_line = pJS.particles.line_linked.color_rgb_line;
               pJS.canvas.ctx.strokeStyle = 'rgba(' + color_line.r + ',' + color_line.g + ',' + color_line.b + ',' + opacity_line + ')';
               pJS.canvas.ctx.lineWidth = pJS.particles.line_linked.width;
               //pJS.canvas.ctx.lineCap = 'round'; /* performance issue */

               /* path */
               pJS.canvas.ctx.beginPath();
               pJS.canvas.ctx.moveTo(p.x, p.y);
               pJS.canvas.ctx.lineTo(pJS.interactivity.mouse.pos_x, pJS.interactivity.mouse.pos_y);
               pJS.canvas.ctx.stroke();
               pJS.canvas.ctx.closePath();

            }

         }

      }

   };

   /* ---------- pJS functions - vendors ------------ */

   pJS.fn.vendors.eventsListeners = function() {

      /* events target element */
      if (pJS.interactivity.detect_on == 'window') {
         pJS.interactivity.el = window;
      } else {
         pJS.interactivity.el = pJS.canvas.el;
      }

      /* detect mouse pos - on hover / click event */
      if (pJS.interactivity.events.onhover.enable || pJS.interactivity.events.onclick.enable) {

         /* el on mousemove */
         pJS.interactivity.el.addEventListener('mousemove', function(e) {

            if (pJS.interactivity.el == window) {
               var pos_x = e.clientX,
                  pos_y = e.clientY;
            } else {
               var pos_x = e.offsetX || e.clientX,
                  pos_y = e.offsetY || e.clientY;
            }

            pJS.interactivity.mouse.pos_x = pos_x;
            pJS.interactivity.mouse.pos_y = pos_y;

            if (pJS.tmp.retina) {
               pJS.interactivity.mouse.pos_x *= pJS.canvas.pxratio;
               pJS.interactivity.mouse.pos_y *= pJS.canvas.pxratio;
            }

            pJS.interactivity.status = 'mousemove';

         });

         /* el on onmouseleave */
         pJS.interactivity.el.addEventListener('mouseleave', function(e) {

            pJS.interactivity.mouse.pos_x = null;
            pJS.interactivity.mouse.pos_y = null;
            pJS.interactivity.status = 'mouseleave';

         });

      }

      /* on click event */
      if (pJS.interactivity.events.onclick.enable) {

         pJS.interactivity.el.addEventListener('click', function() {

            pJS.interactivity.mouse.click_pos_x = pJS.interactivity.mouse.pos_x;
            pJS.interactivity.mouse.click_pos_y = pJS.interactivity.mouse.pos_y;
            pJS.interactivity.mouse.click_time = new Date().getTime();

            if (pJS.interactivity.events.onclick.enable) {

               switch (pJS.interactivity.events.onclick.mode) {

                  case 'push':
                     if (pJS.particles.move.enable) {
                        pJS.fn.modes.pushParticles(pJS.interactivity.modes.push.particles_nb, pJS.interactivity.mouse);
                     } else {
                        if (pJS.interactivity.modes.push.particles_nb == 1) {
                           pJS.fn.modes.pushParticles(pJS.interactivity.modes.push.particles_nb, pJS.interactivity.mouse);
                        } else if (pJS.interactivity.modes.push.particles_nb > 1) {
                           pJS.fn.modes.pushParticles(pJS.interactivity.modes.push.particles_nb);
                        }
                     }
                     break;

                  case 'remove':
                     pJS.fn.modes.removeParticles(pJS.interactivity.modes.remove.particles_nb);
                     break;

                  case 'bubble':
                     pJS.tmp.bubble_clicking = true;
                     break;

                  case 'repulse':
                     pJS.tmp.repulse_clicking = true;
                     pJS.tmp.repulse_count = 0;
                     pJS.tmp.repulse_finish = false;
                     setTimeout(function() {
                        pJS.tmp.repulse_clicking = false;
                     }, pJS.interactivity.modes.repulse.duration * 1000)
                     break;

               }

            }

         });

      }

   };

   pJS.fn.vendors.densityAutoParticles = function() {

      if (pJS.particles.number.density.enable) {

         /* calc area */
         var area = pJS.canvas.el.width * pJS.canvas.el.height / 1000;
         if (pJS.tmp.retina) {
            area = area / (pJS.canvas.pxratio * 2);
         }

         /* calc number of particles based on density area */
         var nb_particles = area * pJS.particles.number.value / pJS.particles.number.density.value_area;

         /* add or remove X particles */
         var missing_particles = pJS.particles.array.length - nb_particles;
         if (missing_particles < 0) pJS.fn.modes.pushParticles(Math.abs(missing_particles));
         else pJS.fn.modes.removeParticles(missing_particles);

      }

   };

   pJS.fn.vendors.checkOverlap = function(p1, position) {
      for (var i = 0; i < pJS.particles.array.length; i++) {
         var p2 = pJS.particles.array[i];

         var dx = p1.x - p2.x,
            dy = p1.y - p2.y,
            dist = Math.sqrt(dx * dx + dy * dy);

         if (dist <= p1.radius + p2.radius) {
            p1.x = position ? position.x : Math.random() * pJS.canvas.w;
            p1.y = position ? position.y : Math.random() * pJS.canvas.h;
            pJS.fn.vendors.checkOverlap(p1);
         }
      }
   };

   pJS.fn.vendors.createSvgImg = function(p) {

      /* set color to svg element */
      var svgXml = pJS.tmp.source_svg,
         rgbHex = /#([0-9A-F]{3,6})/gi,
         coloredSvgXml = svgXml.replace(rgbHex, function(m, r, g, b) {
            if (p.color.rgb) {
               var color_value = 'rgba(' + p.color.rgb.r + ',' + p.color.rgb.g + ',' + p.color.rgb.b + ',' + p.opacity + ')';
            } else {
               var color_value = 'hsla(' + p.color.hsl.h + ',' + p.color.hsl.s + '%,' + p.color.hsl.l + '%,' + p.opacity + ')';
            }
            return color_value;
         });

      /* prepare to create img with colored svg */
      var svg = new Blob([coloredSvgXml], {
            type: 'image/svg+xml;charset=utf-8'
         }),
         DOMURL = window.URL || window.webkitURL || window,
         url = DOMURL.createObjectURL(svg);

      /* create particle img obj */
      var img = new Image();
      img.addEventListener('load', function() {
         p.img.obj = img;
         p.img.loaded = true;
         DOMURL.revokeObjectURL(url);
         pJS.tmp.count_svg++;
      });
      img.src = url;

   };

   pJS.fn.vendors.destroypJS = function() {
      cancelAnimationFrame(pJS.fn.drawAnimFrame);
      canvas_el.remove();
      pJSDom = null;
   };

   pJS.fn.vendors.drawShape = function(c, startX, startY, sideLength, sideCountNumerator, sideCountDenominator) {

      // By Programming Thomas - https://programmingthomas.wordpress.com/2013/04/03/n-sided-shapes/
      var sideCount = sideCountNumerator * sideCountDenominator;
      var decimalSides = sideCountNumerator / sideCountDenominator;
      var interiorAngleDegrees = (180 * (decimalSides - 2)) / decimalSides;
      var interiorAngle = Math.PI - Math.PI * interiorAngleDegrees / 180; // convert to radians
      c.save();
      c.beginPath();
      c.translate(startX, startY);
      c.moveTo(0, 0);
      for (var i = 0; i < sideCount; i++) {
         c.lineTo(sideLength, 0);
         c.translate(sideLength, 0);
         c.rotate(interiorAngle);
      }
      //c.stroke();
      c.fill();
      c.restore();

   };

   pJS.fn.vendors.exportImg = function() {
      window.open(pJS.canvas.el.toDataURL('image/png'), '_blank');
   };

   pJS.fn.vendors.loadImg = function(type) {

      pJS.tmp.img_error = undefined;

      if (pJS.particles.shape.image.src != '') {

         if (type == 'svg') {

            var xhr = new XMLHttpRequest();
            xhr.open('GET', pJS.particles.shape.image.src);
            xhr.onreadystatechange = function(data) {
               if (xhr.readyState == 4) {
                  if (xhr.status == 200) {
                     pJS.tmp.source_svg = data.currentTarget.response;
                     pJS.fn.vendors.checkBeforeDraw();
                  } else {
                     console.log('Error pJS - Image not found');
                     pJS.tmp.img_error = true;
                  }
               }
            }
            xhr.send();

         } else {

            var img = new Image();
            img.addEventListener('load', function() {
               pJS.tmp.img_obj = img;
               pJS.fn.vendors.checkBeforeDraw();
            });
            img.src = pJS.particles.shape.image.src;

         }

      } else {
         console.log('Error pJS - No image.src');
         pJS.tmp.img_error = true;
      }

   };

   pJS.fn.vendors.draw = function() {

      if (pJS.particles.shape.type == 'image') {

         if (pJS.tmp.img_type == 'svg') {

            if (pJS.tmp.count_svg >= pJS.particles.number.value) {
               pJS.fn.particlesDraw();
               if (!pJS.particles.move.enable) cancelRequestAnimFrame(pJS.fn.drawAnimFrame);
               else pJS.fn.drawAnimFrame = requestAnimFrame(pJS.fn.vendors.draw);
            } else {
               //console.log('still loading...');
               if (!pJS.tmp.img_error) pJS.fn.drawAnimFrame = requestAnimFrame(pJS.fn.vendors.draw);
            }

         } else {

            if (pJS.tmp.img_obj != undefined) {
               pJS.fn.particlesDraw();
               if (!pJS.particles.move.enable) cancelRequestAnimFrame(pJS.fn.drawAnimFrame);
               else pJS.fn.drawAnimFrame = requestAnimFrame(pJS.fn.vendors.draw);
            } else {
               if (!pJS.tmp.img_error) pJS.fn.drawAnimFrame = requestAnimFrame(pJS.fn.vendors.draw);
            }

         }

      } else {
         pJS.fn.particlesDraw();
         if (!pJS.particles.move.enable) cancelRequestAnimFrame(pJS.fn.drawAnimFrame);
         else pJS.fn.drawAnimFrame = requestAnimFrame(pJS.fn.vendors.draw);
      }

   };

   pJS.fn.vendors.checkBeforeDraw = function() {

      // if shape is image
      if (pJS.particles.shape.type == 'image') {

         if (pJS.tmp.img_type == 'svg' && pJS.tmp.source_svg == undefined) {
            pJS.tmp.checkAnimFrame = requestAnimFrame(check);
         } else {
            //console.log('images loaded! cancel check');
            cancelRequestAnimFrame(pJS.tmp.checkAnimFrame);
            if (!pJS.tmp.img_error) {
               pJS.fn.vendors.init();
               pJS.fn.vendors.draw();
            }

         }

      } else {
         pJS.fn.vendors.init();
         pJS.fn.vendors.draw();
      }

   };

   pJS.fn.vendors.init = function() {

      /* init canvas + particles */
      pJS.fn.retinaInit();
      pJS.fn.canvasInit();
      pJS.fn.canvasSize();
      pJS.fn.canvasPaint();
      pJS.fn.particlesCreate();
      pJS.fn.vendors.densityAutoParticles();

      /* particles.line_linked - convert hex colors to rgb */
      pJS.particles.line_linked.color_rgb_line = hexToRgb(pJS.particles.line_linked.color);

   };

   pJS.fn.vendors.start = function() {

      if (isInArray('image', pJS.particles.shape.type)) {
         pJS.tmp.img_type = pJS.particles.shape.image.src.substr(pJS.particles.shape.image.src.length - 3);
         pJS.fn.vendors.loadImg(pJS.tmp.img_type);
      } else {
         pJS.fn.vendors.checkBeforeDraw();
      }

   };

   /* ---------- pJS - start ------------ */

   pJS.fn.vendors.eventsListeners();

   pJS.fn.vendors.start();

};

/* ---------- global functions - vendors ------------ */

Object.deepExtend = function(destination, source) {
   for (var property in source) {
      if (source[property] && source[property].constructor &&
         source[property].constructor === Object) {
         destination[property] = destination[property] || {};
         arguments.callee(destination[property], source[property]);
      } else {
         destination[property] = source[property];
      }
   }
   return destination;
};

window.requestAnimFrame = (function() {
   return window.requestAnimationFrame ||
      window.webkitRequestAnimationFrame ||
      window.mozRequestAnimationFrame ||
      window.oRequestAnimationFrame ||
      window.msRequestAnimationFrame ||
      function(callback) {
         window.setTimeout(callback, 1000 / 60);
      };
})();

window.cancelRequestAnimFrame = (function() {
   return window.cancelAnimationFrame ||
      window.webkitCancelRequestAnimationFrame ||
      window.mozCancelRequestAnimationFrame ||
      window.oCancelRequestAnimationFrame ||
      window.msCancelRequestAnimationFrame ||
      clearTimeout
})();

function hexToRgb(hex) {
   // By Tim Down - http://stackoverflow.com/a/5624139/3493650
   // Expand shorthand form (e.g. "03F") to full form (e.g. "0033FF")
   var shorthandRegex = /^#?([a-f\d])([a-f\d])([a-f\d])$/i;
   hex = hex.replace(shorthandRegex, function(m, r, g, b) {
      return r + r + g + g + b + b;
   });
   var result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
   return result ? {
      r: parseInt(result[1], 16),
      g: parseInt(result[2], 16),
      b: parseInt(result[3], 16)
   } : null;
};

function clamp(number, min, max) {
   return Math.min(Math.max(number, min), max);
};

function isInArray(value, array) {
   return array.indexOf(value) > -1;
}

/* ---------- particles.js functions - start ------------ */

window.pJSDom = [];

window.particlesJS = function(tag_id, params) {

   //console.log(params);

   /* no string id? so it's object params, and set the id with default id */
   if (typeof(tag_id) != 'string') {
      params = tag_id;
      tag_id = 'particles-js';
   }

   /* no id? set the id to default id */
   if (!tag_id) {
      tag_id = 'particles-js';
   }

   /* pJS elements */
   var pJS_tag = document.getElementById(tag_id),
      pJS_canvas_class = 'particles-js-canvas-el',
      exist_canvas = pJS_tag.getElementsByClassName(pJS_canvas_class);

   /* remove canvas if exists into the pJS target tag */
   if (exist_canvas.length) {
      while (exist_canvas.length > 0) {
         pJS_tag.removeChild(exist_canvas[0]);
      }
   }

   /* create canvas element */
   var canvas_el = document.createElement('canvas');
   canvas_el.className = pJS_canvas_class;

   /* set size canvas */
   canvas_el.style.width = "100%";
   canvas_el.style.height = "100%";

   /* append canvas */
   var canvas = document.getElementById(tag_id).appendChild(canvas_el);

   /* launch particle.js */
   if (canvas != null) {
      pJSDom.push(new pJS(tag_id, params));
   }

};

window.particlesJS.load = function(tag_id, path_config_json, callback) {

   /* load json config */
   var xhr = new XMLHttpRequest();
   xhr.open('GET', path_config_json);
   xhr.onreadystatechange = function(data) {
      if (xhr.readyState == 4) {
         if (xhr.status == 200) {
            var params = JSON.parse(data.currentTarget.response);
            window.particlesJS(tag_id, params);
            if (callback) callback();
         } else {
            console.log('Error pJS - XMLHttpRequest status: ' + xhr.status);
            console.log('Error pJS - File config not found');
         }
      }
   };
   xhr.send();
};

particlesJS.load('particles-js', 'https://s3-us-west-2.amazonaws.com/s.cdpn.io/199011/XjRprX_particles.json?', function() {});
              
            
!
999px

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