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              <div id="container"></div>

<div id="tag" class="before">
  <h1>SPREAD</h1>
  <p>Click anywhere to have the plane spread</p>
  <ul>
    <li><a href="https://github.com/MathiasPaumgarten/spread">Github</a></li>
  </ul>
  <span>by <a href="http://mathias-paumgarten.com">Mathias Paumgarten</a></span>
</div>
            
          
!
            
              @import "compass/css3";

@import url( https://fonts.googleapis.com/css?family=Quicksand );

html, body {
	width: 100%;
	height: 100%;
	margin: 0;
	padding: 0;
	overflow: hidden;
}

.tile {
	position: absolute;
	display: none;

	@include perspective( 300px );
	@include transform-style( preserve-3d );

	&.from-top {
		display: block;

		@include perspective-origin( 50% 0 );

		.inlay {

			@include transform-origin( 50%, 0, 0 );
			@include transform( rotateX( -90deg ) );
		}

	}

	&.from-bottom {
		display: block;

		@include perspective-origin( 50% 100% );

		.inlay {

			@include transform-origin( 50%, 100%, 0 );
			@include transform( rotateX( 90deg ) );
		}

	}

	&.from-left {
		display: block;

		@include perspective-origin( 0 50% );

		.inlay {

			@include transform-origin( 0, 50%, 0 );
			@include transform( rotateY( 90deg ) );

		}

	}

	&.from-right {
		display: block;

		@include perspective-origin( 100% 50% );

		.inlay {

			@include transform-origin( 100%, 50%, 0 );
			@include transform( rotateY( -90deg ) );

		}

	}
}

.inlay {
	width: 100%;
	height: 100%;

	@include single-transition( all, 0.3s, ease-in-out );
}

.cover {
	width: 100%;
	height: 100%;
	background-color: rgba( 0, 0, 0, 0.4 );

	@include single-transition( background-color, 0.3s, ease-in-out );
}

.tile .inlay.show {
	@include transform( rotateX( 0 ) rotateY( 0 ) );

	.cover {
		background-color: rgba( 0, 0, 0, 0 );
	}
}

#tag.before {
	width: 0;
	left: 0;
	padding: 15px 0 0 0;

	h1, p, ul, span {
		opacity: 0;
		@include transform( translate3d( -50px, 0, 0 ) );
	}

}

#tag.in {
	width: 220px;
}

#tag {
	@include single-transition( all, 0.3s, cubic-bezier( 0.8, 0, 0.2, 1 ) );

	position: fixed;
	width: 180px;
	height: 180px;
	top: 20px;
	left: 20px;
	font-family: "Quicksand", sans-serif;
	padding: 15px 0 0 20px;
	background-color: #000;
	color: #fff;

	h1, p, ul, span {
		opacity: 1;
		@include transform( translate3d( 0, 0, 0 ) );
	}

	h1 {
		@include single-transition( all, 0.3s, ease-in-out, 0.3s );
		font-size: 30px;
		font-weight: 400;
		margin: 0;
	}

	p {
		@include single-transition( all, 0.3s, ease-in-out, 0.4s );
	}

	ul {
		@include single-transition( all, 0.3s, ease-in-out, 0.6s );
	}

	p , ul a {
		font-size: 12px;
		font-weight: 700;
	}

	a {
		color: #fff;
		text-decoration: none;
	}

	a:hover {
		background-color: #333;
	}

	span {
		@include single-transition( all, 0.3s, ease-in-out, 0.7s );

		display: inline-block;
		margin-top: 40px;
		font-size: 10px;
	}

	ul {
		list-style: none;
		margin: 0;
		padding: 0;
	}
}
            
          
!
            
              /*
 * The original code uses AMD and can be 
 * found here:
 * https://github.com/MathiasPaumgarten/spread
 */

var container = document.getElementById( "container" );
var tag = document.getElementById( "tag" );

var orientation = {
	TOP: 0,
	RIGHT: 1,
	BOTTOM: 2,
	LEFT: 3
}

var options = {
	tileSize: 80,
	color: "#4fb0ca",
	randomColor: true
}

var color = function() {

	var values = [ "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f" ];
	var color = "#", i = 7;

	while ( --i ) color += values[ ~~( Math.random() * 16 ) ];

	return color;
}

var random = function( min, max ) {
	return min + Math.random() * ( max - min );
}

var Tile = function( x, y, color, onComplete ) {

	var div, inlay, cover;
	var neighbors = [];
	var isShown = false;

	function initUI() {

		div = document.createElement( "div" );
		div.className = "tile";
		div.style.width = options.tileSize + "px";
		div.style.height = options.tileSize + "px";
		div.style.top = y * options.tileSize + "px";
		div.style.left = x * options.tileSize + "px";

		inlay = document.createElement( "div" );
		inlay.className = "inlay";
		inlay.style.backgroundColor = color;

		cover = document.createElement( "div" );
		cover.className = "cover";

		div.appendChild( inlay );
		inlay.appendChild( cover );

	}

	// ------
	// PUBLIC
	// ------

	this.isShown = function() {
		return isShown;
	}

	this.getElement = function() {
		return div;
	}

	this.addNeighbor = function( direction, neighbor ) {
		neighbors[ direction ] = neighbor;
	}

	this.fromTop = function() {
		div.classList.add( "from-top" );
		show();
	}

	this.fromBottom = function() {
		div.classList.add( "from-bottom" );
		show();
	}

	this.fromRight = function() {
		div.classList.add( "from-right" );
		show();
	}

	this.fromLeft = function() {
		div.classList.add( "from-left" );
		show();
	}

	function onTransitionEnd() {

		for ( var i = 0; i < neighbors.length; i++ ) {

			if ( neighbors[ i ] && ! neighbors[ i ].isShown() ) {

				neighbors[ i ][ getFunctionName( i ) ]();

				setTimeout( onTransitionEnd, random( 10, 200 ) );
				break;

			}

		}

	}

	// -------
	// PRIVATE
	// -------

	function getFunctionName( index ) {
		return [ "fromBottom", "fromLeft", "fromTop", "fromRight" ][ index ];
	}

	function show() {
		isShown = true;

		setTimeout( function() {

			inlay.classList.add( "show" );

			setTimeout( onTransitionEnd, random( 200, 300 ) );
			setTimeout( onComplete, 300 );

		}, 50 );
	}

	initUI();

}

var Controller = function( container, size, position ) {

	var width = Math.ceil( size.width / options.tileSize );
	var height = Math.ceil( size.height / options.tileSize );
	var tiles = [];
	var onComplete = null;
	var completeCount = 0;
	var tileColor = options.randomColor ? color() : options.color;

	function init() {
		fillScreen();
		snowball();
	}

	// ------
	// PUBLIC
	// ------

	this.onComplete = function( closure ) {
		onComplete = closure
	}

	this.getColor = function() {
		return tileColor;
	}

	// -------
	// PRIVATE
	// -------

	function fillScreen() {

		var tile;
		var length = width * height;

		for ( var y = 0; y < height; y++ ) {
			for ( var x = 0; x < width; x++ ) {

				tile = new Tile( x, y, tileColor, tileComplete );

				container.appendChild( tile.getElement() );

				tiles.push( tile );

			}
		}

		for ( var i = 0; i < length; i++ ) {

			tile = tiles[ i ];
			row = ~~( i / width );
			col = i % width;

			if ( col < width - 1 )
				tile.addNeighbor( orientation.RIGHT, tiles[ i + 1 ] );

			if ( col > 0 )
				tile.addNeighbor( orientation.LEFT, tiles[ i - 1 ] );

			if ( row > 0 )
				tile.addNeighbor( orientation.TOP, tiles[ i - width ] );

			if ( row < height - 1 )
				tile.addNeighbor( orientation.BOTTOM, tiles[ i + width ] );
		}
	}

	function snowball() {
    
		var row = ~~( position.y / options.tileSize );
		var col = ~~( position.x / options.tileSize );
    
		tiles[ col + row * width ].fromTop();
	}

	function tileComplete() {
		completeCount++;

		if ( completeCount === tiles.length && onComplete ) {
			onComplete();
		}
	}

	init();

}

function initListeners() {

	document.addEventListener( "click", onClick, false );
	document.addEventListener( "touchstart", onTouchEnd, false );

}

function onClick( event ) { 

	var div = document.createElement( "div" );

	var size = {
		width: window.innerWidth,
		height: window.innerHeight
	}

	var position = {
		x: event.pageX,
		y: event.pageY
	}

	var controller = new Controller( div, size, position );

	controller.onComplete( function() {

		document.body.style.backgroundColor = controller.getColor();
		container.removeChild( div );

	} );

	container.appendChild( div );

}

function onTouchEnd( event ) {

	var touch = event.touches[ 0 ];

	event.pageX = touch.pageX;
	event.pageY = touch.pageY;

	onClick( event );
}

function setTag() {
  tag.className = "before in";
  
  setTimeout( function() {
    tag.className = "";
  }, 300 );
}

function start() {
  var event = {
    pageX: window.innerWidth / 2,
    pageY: window.innerHeight / 2
  } 
  
  onClick( event );
}

initListeners();
setTag();

setTimeout( start, 1000 );
            
          
!
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