cssAudio - ActiveCSS - ActiveGeneric - ActiveHTML - ActiveImage - ActiveJS - ActiveSVG - ActiveText - Activefile-genericVideo - Activehtmloctocatspinnerstartv

Pen Settings

CSS Base

Vendor Prefixing

Add External CSS

These stylesheets will be added in this order and before the code you write in the CSS editor. You can also add another Pen here, and it will pull the CSS from it. Try typing "font" or "ribbon" below.

Quick-add: + add another resource

Add External JavaScript

These scripts will run in this order and before the code in the JavaScript editor. You can also link to another Pen here, and it will run the JavaScript from it. Also try typing the name of any popular library.

Quick-add: + add another resource

Code Indentation

     

Save Automatically?

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

            
              <canvas id="bgCanvas"></canvas>

<iframe width="0" height="0" scrolling="no" frameborder="no" src="https://w.soundcloud.com/player/?url=https%3A//api.soundcloud.com/tracks/84101102&amp;color=000000&amp;auto_play=true&amp;show_artwork=true"></iframe>
            
          
!
            
              body, html {
    background-color: #000;
    color: #fff;
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    overflow: hidden;
}
canvas {
    position:absolute;
    top: 0;
    left: 0;
}
iframe {
  position: absolute;
  bottom: 0;
  left: 0;
}
            
          
!
            
                (function () {
      var requestAnimationFrame = window.requestAnimationFrame || window.mozRequestAnimationFrame || window.webkitRequestAnimationFrame || window.msRequestAnimationFrame || function (callback) {
              window.setTimeout(callback, 1000 / 60);
          };
      window.requestAnimationFrame = requestAnimationFrame;
  })();

  // Terrain stuff.
  var background = document.getElementById("bgCanvas"),
      bgCtx = background.getContext("2d"),
      width = window.innerWidth,
      height = document.body.offsetHeight;

  (height < 400) ? height = 400 : height;

  background.width = width;
  background.height = height;

  function Terrain(options) {
      options = options || {};
      this.terrain = document.createElement("canvas");
      this.terCtx = this.terrain.getContext("2d");
      this.scrollDelay = options.scrollDelay || 90;
      this.lastScroll = new Date().getTime();

      this.terrain.width = width;
      this.terrain.height = height;
      this.fillStyle = options.fillStyle || "#191D4C";
      this.mHeight = options.mHeight || height;

      // generate
      this.points = [];

      var displacement = options.displacement || 140,
          power = Math.pow(2, Math.ceil(Math.log(width) / (Math.log(2))));

      // set the start height and end height for the terrain
      this.points[0] = this.mHeight;//(this.mHeight - (Math.random() * this.mHeight / 2)) - displacement;
      this.points[power] = this.points[0];

      // create the rest of the points
      for (var i = 1; i < power; i *= 2) {
          for (var j = (power / i) / 2; j < power; j += power / i) {
              this.points[j] = ((this.points[j - (power / i) / 2] + this.points[j + (power / i) / 2]) / 2) + Math.floor(Math.random() * -displacement + displacement);
          }
          displacement *= 0.6;
      }

      document.body.appendChild(this.terrain);
  }

  Terrain.prototype.update = function () {
      // draw the terrain
      this.terCtx.clearRect(0, 0, width, height);
      this.terCtx.fillStyle = this.fillStyle;
      
      if (new Date().getTime() > this.lastScroll + this.scrollDelay) {
          this.lastScroll = new Date().getTime();
          this.points.push(this.points.shift());
      }

      this.terCtx.beginPath();
      for (var i = 0; i <= width; i++) {
          if (i === 0) {
              this.terCtx.moveTo(0, this.points[0]);
          } else if (this.points[i] !== undefined) {
              this.terCtx.lineTo(i, this.points[i]);
          }
      }

      this.terCtx.lineTo(width, this.terrain.height);
      this.terCtx.lineTo(0, this.terrain.height);
      this.terCtx.lineTo(0, this.points[0]);
      this.terCtx.fill();
  }


  // Second canvas used for the stars
  bgCtx.fillStyle = '#05004c';
  bgCtx.fillRect(0, 0, width, height);

  // stars
  function Star(options) {
      this.size = Math.random() * 2;
      this.speed = Math.random() * .05;
      this.x = options.x;
      this.y = options.y;
  }

  Star.prototype.reset = function () {
      this.size = Math.random() * 2;
      this.speed = Math.random() * .05;
      this.x = width;
      this.y = Math.random() * height;
  }

  Star.prototype.update = function () {
      this.x -= this.speed;
      if (this.x < 0) {
          this.reset();
      } else {
          bgCtx.fillRect(this.x, this.y, this.size, this.size);
      }
  }

  function ShootingStar() {
      this.reset();
  }

  ShootingStar.prototype.reset = function () {
      this.x = Math.random() * width;
      this.y = 0;
      this.len = (Math.random() * 80) + 10;
      this.speed = (Math.random() * 10) + 6;
      this.size = (Math.random() * 1) + 0.1;
      // this is used so the shooting stars arent constant
      this.waitTime = new Date().getTime() + (Math.random() * 3000) + 500;
      this.active = false;
  }

  ShootingStar.prototype.update = function () {
      if (this.active) {
          this.x -= this.speed;
          this.y += this.speed;
          if (this.x < 0 || this.y >= height) {
              this.reset();
          } else {
              bgCtx.lineWidth = this.size;
              bgCtx.beginPath();
              bgCtx.moveTo(this.x, this.y);
              bgCtx.lineTo(this.x + this.len, this.y - this.len);
              bgCtx.stroke();
          }
      } else {
          if (this.waitTime < new Date().getTime()) {
              this.active = true;
          }
      }
  }

  var entities = [];

  // init the stars
  for (var i = 0; i < height; i++) {
      entities.push(new Star({
          x: Math.random() * width,
          y: Math.random() * height
      }));
  }

  // Add 2 shooting stars that just cycle.
  entities.push(new ShootingStar());
  entities.push(new ShootingStar());
entities.push(new Terrain({mHeight : 80}));
entities.push(new Terrain({displacement : 120, scrollDelay : 50, fillStyle : "rgb(17,20,40)", mHeight : 140}));
  entities.push(new Terrain({displacement : 100, scrollDelay : 20, fillStyle : "rgb(10,10,5)", mHeight : 200}));

  //animate background
  function animate() {
      bgCtx.fillStyle = '#110E19';
      bgCtx.fillRect(0, 0, width, height);
      bgCtx.fillStyle = '#ffffff';
      bgCtx.strokeStyle = '#ffffff';

      var entLen = entities.length;

      while (entLen--) {
          entities[entLen].update();
      }
      requestAnimationFrame(animate);
  }
  animate();
            
          
!
999px
Close

Asset uploading is a PRO feature.

As a PRO member, you can drag-and-drop upload files here to use as resources. Images, Libraries, JSON data... anything you want. You can even edit them anytime, like any other code on CodePen.

Go PRO

Loading ..................

Console