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HTML

              
                <!--Depending on your screen size you may have to scroll ;)-->
<canvas></canvas>
<input type="button" onClick="change_color()" value="Add Color">

              
            
!

CSS

              
                body{
  margin: 0;
  padding: 0;
  background: #212121;
}

input[type="button"]{
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 10;
  width: 200px;
  height: 50px;
  background: #1F80D1;
  border-radius: 3px;
  font-family: Arial;
  font-size: 15px;
  color: #fff;
  cursor: pointer;
  border: 0px solid #fff;
  text-shadow: 0 1px 0 #0055A1;
}

input[type="button"]:hover{
  background: #0066B7;
}

input[type="button"]:focus{
  outline: none;
}
              
            
!

JS

              
                //Forked by https://codepen.io/motorlatitude/pen/jLAhf
window.requestAnimFrame = (function(){
  return  window.requestAnimationFrame || 
    window.webkitRequestAnimationFrame || 
    window.mozRequestAnimationFrame    || 
    window.oRequestAnimationFrame      || 
    window.msRequestAnimationFrame     ||  
    function( callback ){
    window.setTimeout(callback, 1000 / 60);
  };
})();
/*Define Global Variabls */
var canvas = document.getElementsByTagName("canvas")[0];
var ctx = canvas.getContext("2d");
var w = 1500, h = window.outerHeight;
canvas.width = w;
canvas.height = h;
var counter = 0;
var counter2 = 0;
var add_color = false;

var particles = [];
//For those interested in how the array below generates the letters: [number of particles, min x coord, max x coord, min y coord, max y coord];
var c = [10,130,220,100,120, //C
         10,110,170,125,140,
         8,100,140,145,160,
         8,100,140,165,180,
         8,100,140,185,200,
         8,100,140,215,230,
         8,120,180,235,250,
         10,130,225,255,270,
         15,300,370,100,120, //O
         10,280,300,125,150,
         10,370,430,125,140,
         10,260,280,145,150,
         10,390,450,145,150,
         10,250,260,165,200,
         10,400,440,165,200,
         10,260,280,185,230,
         10,390,450,185,230,
         10,280,300,205,250,
         10,370,430,205,250,
         15,300,370,225,270,
         60,500,530,100,270, //D
         15,530,600,100,120,
         10,600,620,110,120,
         10,600,640,130,180,
         10,630,650,160,200,
         10,630,650,190,230,
         10,630,650,230,250,
         15,530,600,240,270,
         60,700,720,100,270, //E
         20,710,820,100,130,
         20,710,790,170,190,
         20,710,820,250,270,
         60,880,900,100,270, //P
         10,895,990,100,120,
         20,990,1000,110,190,
         10,895,1000,185,210,
         60,1080,1100,100,270, //E
         20,1090,1200,100,130,
         20,1090,1180,170,190,
         20,1090,1200,250,270,
         25,1280,1300,100,270, //N
         25,1380,1400,100,270,
         2,1295,1310,100,120,
         2,1310,1320,120,140,
         2,1320,1330,140,160,
         2,1330,1340,160,180,
         2,1340,1350,180,200,
         2,1350,1360,200,220,
         2,1360,1370,220,240,
         2,1370,1380,240,260,
         2,1380,1390,260,280,
         2,1390,1400,260,270,
        ];
         
         function init(){
         counter = 0;
         counter2 = 0;
         particles = [];
reset_scene();
for(var i=0;i<c.length;i+=5){
  for(var k=0;k<c[i];k++){
    var p = new particle(c[1+i],c[2+i],c[3+i],c[4+i]);
    particles.push(p);
  }
}
}

function change_color(){
  add_color = !add_color;
  if(add_color == true){
    $("input").val("Remove Color");
  }
  else{
    $("input").val("Add Color");
  }
  init();
}

function reset_scene(){
  if(add_color == false){
    ctx.fillStyle = "#212121";
    $("body").css("background","#212121");
  }
  else{
    ctx.fillStyle = "#eee";
    $("body").css("background","#eee");
  }
  ctx.fillRect(0,0,w,h);
}

function drawscene(){
  counter++;
  reset_scene();
  for(var i=0;i<particles.length;i++){
    var p = particles[i];
    //calc diff from curr to final
    if(counter < 250){
      var dX = p.fx - p.x;
      var dY = p.fy - p.y;
      var dist = Math.sqrt(dX*dX + dY*dY);
      
      if(dist<=10){
        p.vx = 0;
        p.vy = 0;
        p.ex = false;
      }
      else{
        if(dX == dY){
          
        }
        if(dY < 0){
          dY = -dY;
        }
        p.vy = dY*0.03;
        
        if(dX < 0){
          dX = -dX;
        }
        p.vx = dX*0.03;
        
      }
      
      
      if(p.x > p.fx){
        p.x -= p.vx
      }
      else{
        p.x += p.vx
      }
      
      if(p.y > p.fy){
        p.y -= p.vy
      }
      else{
        p.y += p.vy
      }
      
      p.draw();
    }
    else{
      counter2++;
      if(counter2>100000){
        counter = 0;
        counter2 = 0;
      }
      var dX = p.x - p.ox;
      var dY = p.y - p.oy;
      var dist = Math.sqrt(dX*dX + dY*dY);
      
      if(dist<=10){
        p.vx = 0;
        p.vy = 0;
        p.ex = true;
      }
      else{
        if(dX == dY){
          
        }
        if(dY < 0){
          dY = -dY;
        }
        p.vy = dY*0.03;
        
        if(dX < 0){
          dX = -dX;
        }
        p.vx = dX*0.03;
        
      }
      
      
      if(p.x > p.ox){
        p.x -= p.vx
      }
      else{
        p.x += p.vx
      }
      
      if(p.y > p.oy){
        p.y -= p.vy
      }
      else{
        p.y += p.vy
      }
      
      p.draw();
    }
  }
}

function particle(x1,x2,y1,y2){
  this.ox = Math.random()*w;
  this.oy = Math.random()*h;
  this.x = this.ox;
  this.y = this.oy;
  this.ex = true; //this particle is in exploded state
  //Final Position COORDS
  var maxx = x1;
  var minx = x2;
  this.fx = Math.floor(Math.random()*(maxx-minx+1)+minx);
  var maxy = y1;
  var miny = y2;
  this.fy = Math.floor(Math.random()*(maxy-miny+1)+miny);
  
  this.vx = 5;
  this.vy = 5;
  var max = 10;
  var min = 1;
  this.r = Math.floor(Math.random()*(max-min+1)+min);
  if(add_color == true){
    var max = 255;
    var min = 0;
    this.hue = Math.floor(Math.random()*(max-min+1)+min);
  }
  
  this.draw = function(){
    if(add_color == false){
      ctx.fillStyle = "rgba(255,255,255,0.4)";
    }
    else{
      ctx.fillStyle = 'hsla('+this.hue+', 100%, 40%, 0.4)';
    }
    ctx.beginPath();
    ctx.arc(this.x, this.y, this.r, 0, 2*Math.PI, false);
    ctx.fill();
  }
}

function animloop() {
  drawscene();
  requestAnimFrame(animloop); 
}
init();
animloop();
              
            
!
999px

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