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CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

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CSS Base

About CSS Base

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

     

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About Vendor Prefixing

To get the best cross-browser support, it is a common practice to apply vendor prefixes to CSS properties and values that require them to work. For instance -webkit- or -moz-.

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About JavaScript Preprocessors

JavaScript preprocessors can help make authoring JavaScript easier and more convenient. For instance, CoffeeScript can help prevent easy-to-make mistakes and offer a cleaner syntax and Babel can bring ECMAScript 6 features to browsers that only support ECMAScript 5.

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You're using npm packages, so we've auto-selected Babel for you here, which we require to process imports and make it all work. If you need to use a different JavaScript preprocessor, remove the packages in the npm tab.

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If the script you link to has the file extension of a preprocessor, we'll attempt to process it before applying.

You can also link to another Pen here, and we'll pull the JavaScript from that Pen and include it. If it's using a matching preprocessor, we'll combine the code before preprocessing, so you can use the linked Pen as a true dependency.

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HTML

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

<div id="menu">
  <a id="btSaveSVG" class="bt">Save SVG</a>
</div>
!

CSS

            
              html, body, div {
  margin: 0;
  padding: 0;
  border: 0;
}
body {
  overflow: hidden;
  background-image: url("http://www.nkunited.de/ExternalImages/jsfiddle/wallPattern.png");
  background-repeat: repeat;
}
.borderimg {
  border: 106px solid transparent;
  padding: 0px;
  -webkit-border-image: url(http://www.nkunited.de/ExternalImages/jsfiddle/ImageFrame.png) 37 round; /* Safari 3.1-5 */
  -o-border-image: url(http://www.nkunited.de/ExternalImages/jsfiddle/ImageFrame.png) 37 round; /* Opera 11-12.1 */
  border-image: url(http://www.nkunited.de/ExternalImages/jsfiddle/ImageFrame.png) 37 round;
}

#container {
	width: 500px;
  height: 500px;
	background-color: #fff;
	position: absolute;
  left:0; right:0;
  top:0; bottom:0;
	margin:auto;
  text-align: center;
}

.bt {
	-moz-box-shadow:inset 0px 1px 0px 0px #2c302e;
	-webkit-box-shadow:inset 0px 1px 0px 0px #2c302e;
	box-shadow:inset 0px 1px 0px 0px #2c302e;
	background:-webkit-gradient(linear, left top, left bottom, color-stop(0.05, #909590), color-stop(1, #474a48));
	background:-moz-linear-gradient(top, #909590 5%, #474a48 100%);
	background:-webkit-linear-gradient(top, #909590 5%, #474a48 100%);
	background:-o-linear-gradient(top, #909590 5%, #474a48 100%);
	background:-ms-linear-gradient(top, #909590 5%, #474a48 100%);
	background:linear-gradient(to bottom, #909590 5%, #474a48 100%);
	background-color:#909590;
	-moz-border-radius:3px;
	-webkit-border-radius:3px;
	border-radius:3px;
	border:1px solid #2c302e;
	display:inline-block;
	cursor:pointer;
	color:#ffffff;
	font-family:Arial;
	font-size:12px;
	padding:4px 12px;
	text-decoration:none;
	text-shadow:0px 1px 0px #2c302e;
}
.bt:hover {
	background:-webkit-gradient(linear, left top, left bottom, color-stop(0.05, #474a48), color-stop(1, #909590));
	background:-moz-linear-gradient(top, #474a48 5%, #909590 100%);
	background:-webkit-linear-gradient(top, #474a48 5%, #909590 100%);
	background:-o-linear-gradient(top, #474a48 5%, #909590 100%);
	background:-ms-linear-gradient(top, #474a48 5%, #909590 100%);
	background:linear-gradient(to bottom, #474a48 5%, #909590 100%);
	background-color:#474a48;
}
.bt:active {
	position:relative;
	top:1px;
}

#menu {
  position: absolute;
  top: 10px;
  left: 10px;
}
!

JS

            
              var SPEED = 1;

var LINE_WIDTH = 2;
var LINE_DISTANCE = 2;
var LINE_COLOR = 'rgb(0,0,0)';
var LINE_CAP = 'square';//square, butt or round

var w = 500;
var h = 500;

//---

var canvas;

var lineHolder = [];
var lineHolderWidth = 0;
var lineHolderHeight = 0;

var path;
var pathCoordinates = '';

var posHolder;

var counter;
var halftime;

var interval;

var btSaveSVG;

//---

var patternLineTop = {};
		patternLineTop.coords = [ { x:0, y:-1 } ];
    patternLineTop.maxLength = Math.floor( w / ( LINE_WIDTH + LINE_DISTANCE ) ) / 2;
    patternLineTop.currentLength = 0;
    patternLineTop.allowLimit = true;
    patternLineTop.index = 0;
    patternLineTop.indexAscending = false;

var patternLineDown = {};
		patternLineDown.coords = [ { x:0, y:1 } ];
    patternLineDown.maxLength = Math.floor( w / ( LINE_WIDTH + LINE_DISTANCE ) ) / 2;
    patternLineDown.currentLength = 0;
    patternLineDown.allowLimit = true;
    patternLineDown.index = 0;
    patternLineDown.indexAscending = false;
    
var patternLineLeft = {};
    patternLineLeft.coords = [ { x:-1, y:0 } ];
    patternLineLeft.maxLength = Math.floor( w / ( LINE_WIDTH + LINE_DISTANCE ) ) / 2;
    patternLineLeft.currentLength = 0;
    patternLineLeft.allowLimit = true;
    patternLineLeft.index = 0;
    patternLineLeft.indexAscending = false;

var patternLineRight = {};
    patternLineRight.coords = [ { x:1, y:0 } ];
    patternLineRight.maxLength = Math.floor( w / ( LINE_WIDTH + LINE_DISTANCE ) ) / 2;
    patternLineRight.currentLength = 0;
    patternLineRight.allowLimit = true;
    patternLineRight.index = 0;
    patternLineRight.indexAscending = false;
    
var patternRandom = {};
    patternRandom.coords = [ { x:0, y:0 } ];
    patternRandom.maxLength = Math.floor( w / ( LINE_WIDTH + LINE_DISTANCE ) );//15;//Math.floor( w / ( LINE_WIDTH + LINE_DISTANCE ) ) * Math.floor( h / ( LINE_WIDTH + LINE_DISTANCE ) );
    patternRandom.currentLength = 0;
    patternRandom.allowLimit = true;
    patternRandom.index = 0;
    patternRandom.indexAscending = false;
    
var patternSpiralLeft = {};
		patternSpiralLeft.coords = [ { x:0, y:0 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:1, y:0 }, { x:1, y:0 }, { x:0, y:1 }, { x:0, y:1 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 } ];
    patternSpiralLeft.maxLength = patternSpiralLeft.coords.length;
    patternSpiralLeft.currentLength = 0;
    patternSpiralLeft.allowLimit = false;
    patternSpiralLeft.index = 0;
    patternSpiralLeft.indexAscending = true;
    
var patternSpiralRight = {};
		patternSpiralRight.coords = [ { x:0, y:0 }, { x:1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 } ];
    patternSpiralRight.maxLength = patternSpiralRight.coords.length;
    patternSpiralRight.currentLength = 0;
    patternSpiralRight.allowLimit = false;
    patternSpiralRight.index = 0;
    patternSpiralRight.indexAscending = true;
    
var patternSquare3x3 = {};
    patternSquare3x3.coords = [ { x:1, y:0 }, { x:1, y:0 }, { x:0, y:1 }, { x:0, y:1 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:0, y:-1 } ];
    patternSquare3x3.maxLength = patternSquare3x3.coords.length;
    patternSquare3x3.currentLength = 0;
    patternSquare3x3.allowLimit = true;
    patternSquare3x3.index = 0;
    patternSquare3x3.indexAscending = true;

var patternCross1x1 = {};
    patternCross1x1.coords = [ { x:0, y:0 }, { x:1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:0, y:1 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:1, y:0 }, { x:1, y:0 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:1, y:0 }, { x:0, y:1 }, { x:0, y:1 } ];
    patternCross1x1.maxLength = patternCross1x1.coords.length;
    patternCross1x1.currentLength = 0;
    patternCross1x1.allowLimit = false;
    patternCross1x1.index = 0;
    patternCross1x1.indexAscending = true;
    
var patternCross2x2 = {};
    patternCross2x2.coords = [ { x:0, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:0, y:1 }, { x:0, y:1 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:0, y:1 }, { x:0, y:1 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:1, y:0 }, { x:1, y:0 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:1, y:0 }, { x:1, y:0 }, { x:0, y:1 } ];
    patternCross2x2.maxLength = patternCross2x2.coords.length;
    patternCross2x2.currentLength = 0;
    patternCross2x2.allowLimit = false;
    patternCross2x2.index = 0;
    patternCross2x2.indexAscending = true;
    
var patternCross3x3 = {};
    patternCross3x3.coords = [ { x:0, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:0, y:1 }, { x:0, y:1 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:1, y:0 }, { x:1, y:0 }, { x:0, y:1 }, { x:0, y:1 } ];
    patternCross3x3.maxLength = patternCross3x3.coords.length;
    patternCross3x3.currentLength = 0;
    patternCross3x3.allowLimit = false;
    patternCross3x3.index = 0;
    patternCross3x3.indexAscending = true;
    
var patternCross4x4 = {};
    patternCross4x4.coords = [ { x:0, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:0, y:1 }, { x:0, y:1 } ];
    patternCross4x4.maxLength = patternCross4x4.coords.length;
    patternCross4x4.currentLength = 0;
    patternCross4x4.allowLimit = false;
    patternCross4x4.index = 0;
    patternCross4x4.indexAscending = true;
    
var patternHorseshoeUp1x1 = {};
    patternHorseshoeUp1x1.coords = [ { x:0, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:-1 } ];
    patternHorseshoeUp1x1.maxLength = patternHorseshoeUp1x1.coords.length;
    patternHorseshoeUp1x1.currentLength = 0;
    patternHorseshoeUp1x1.allowLimit = false;
    patternHorseshoeUp1x1.index = 0;
    patternHorseshoeUp1x1.indexAscending = true;
    
var patternHorseshoeDown1x1 = {};
    patternHorseshoeDown1x1.coords = [ { x:0, y:0 }, { x:0, y:-1 }, { x:1, y:0 }, { x:0, y:1 } ];
    patternHorseshoeDown1x1.maxLength = patternHorseshoeDown1x1.coords.length;
    patternHorseshoeDown1x1.currentLength = 0;
    patternHorseshoeDown1x1.allowLimit = false;
    patternHorseshoeDown1x1.index = 0;
    patternHorseshoeDown1x1.indexAscending = true;
    
var patternHorseshoeLeft1x1 = {};
    patternHorseshoeLeft1x1.coords = [ { x:0, y:0 }, { x:1, y:0 }, { x:0, y:1 }, { x:-1, y:0 } ];
    patternHorseshoeLeft1x1.maxLength = patternHorseshoeLeft1x1.coords.length;
    patternHorseshoeLeft1x1.currentLength = 0;
    patternHorseshoeLeft1x1.allowLimit = false;
    patternHorseshoeLeft1x1.index = 0;
    patternHorseshoeLeft1x1.indexAscending = true;
    
var patternHorseshoeRight1x1 = {};
    patternHorseshoeRight1x1.coords = [ { x:0, y:0 }, { x:-1, y:0 }, { x:0, y:1 }, { x:1, y:0 } ];
    patternHorseshoeRight1x1.maxLength = patternHorseshoeRight1x1.coords.length;
    patternHorseshoeRight1x1.currentLength = 0;
    patternHorseshoeRight1x1.allowLimit = false;
    patternHorseshoeRight1x1.index = 0;
    patternHorseshoeRight1x1.indexAscending = true;
    
var patternHorseshoeUp2x2 = {};
    patternHorseshoeUp2x2.coords = [ { x:0, y:0 }, { x:0, y:1 }, { x:0, y:1 }, { x:1, y:0 }, { x:1, y:0 }, { x:0, y:-1 }, { x:0, y:-1 } ];
    patternHorseshoeUp2x2.maxLength = patternHorseshoeUp2x2.coords.length;
    patternHorseshoeUp2x2.currentLength = 0;
    patternHorseshoeUp2x2.allowLimit = true;
    patternHorseshoeUp2x2.index = 0;
    patternHorseshoeUp2x2.indexAscending = true;
    
var patternHorseshoeDown2x2 = {};
    patternHorseshoeDown2x2.coords = [ { x:0, y:0 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:1, y:0 }, { x:1, y:0 }, { x:0, y:1 }, { x:0, y:1 } ];
    patternHorseshoeDown2x2.maxLength = patternHorseshoeDown2x2.coords.length;
    patternHorseshoeDown2x2.currentLength = 0;
    patternHorseshoeDown2x2.allowLimit = true;
    patternHorseshoeDown2x2.index = 0;
    patternHorseshoeDown2x2.indexAscending = true;
    
var patternHorseshoeLeft2x2 = {};
    patternHorseshoeLeft2x2.coords = [ { x:0, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:0, y:1 }, { x:0, y:1 }, { x:-1, y:0 }, { x:-1, y:0 } ];
    patternHorseshoeLeft2x2.maxLength = patternHorseshoeLeft2x2.coords.length;
    patternHorseshoeLeft2x2.currentLength = 0;
    patternHorseshoeLeft2x2.allowLimit = true;
    patternHorseshoeLeft2x2.index = 0;
    patternHorseshoeLeft2x2.indexAscending = true;
    
var patternHorseshoeRight2x2 = {};
    patternHorseshoeRight2x2.coords = [ { x:0, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:0, y:1 }, { x:0, y:1 }, { x:1, y:0 }, { x:1, y:0 } ];
    patternHorseshoeRight2x2.maxLength = patternHorseshoeRight2x2.coords.length;
    patternHorseshoeRight2x2.currentLength = 0;
    patternHorseshoeRight2x2.allowLimit = true;
    patternHorseshoeRight2x2.index = 0;
    patternHorseshoeRight2x2.indexAscending = true;
    
var patternHorseshoeUp3x3 = {};
    patternHorseshoeUp3x3.coords = [ { x:0, y:0 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 } ];
    patternHorseshoeUp3x3.maxLength = patternHorseshoeUp3x3.coords.length;
    patternHorseshoeUp3x3.currentLength = 0;
    patternHorseshoeUp3x3.allowLimit = true;
    patternHorseshoeUp3x3.index = 0;
    patternHorseshoeUp3x3.indexAscending = true;
    
var patternHorseshoeDown3x3 = {};
    patternHorseshoeDown3x3.coords = [ { x:0, y:0 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 } ];
    patternHorseshoeDown3x3.maxLength = patternHorseshoeDown3x3.coords.length;
    patternHorseshoeDown3x3.currentLength = 0;
    patternHorseshoeDown3x3.allowLimit = true;
    patternHorseshoeDown3x3.index = 0;
    patternHorseshoeDown3x3.indexAscending = true;
    
var patternHorseshoeLeft3x3 = {};
    patternHorseshoeLeft3x3.coords = [ { x:0, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 } ];
    patternHorseshoeLeft3x3.maxLength = patternHorseshoeLeft3x3.coords.length;
    patternHorseshoeLeft3x3.currentLength = 0;
    patternHorseshoeLeft3x3.allowLimit = true;
    patternHorseshoeLeft3x3.index = 0;
    patternHorseshoeLeft3x3.indexAscending = true;
    
var patternHorseshoeRight3x3 = {};
    patternHorseshoeRight3x3.coords = [ { x:0, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 } ];
    patternHorseshoeRight3x3.maxLength = patternHorseshoeRight3x3.coords.length;
    patternHorseshoeRight3x3.currentLength = 0;
    patternHorseshoeRight3x3.allowLimit = true;
    patternHorseshoeRight3x3.index = 0;
    patternHorseshoeRight3x3.indexAscending = true;
    
var patternZigZagTop1x1 = {};
    patternZigZagTop1x1.coords = [ { x:0, y:0 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:1, y:0 }, { x:0, y:-1 } ];
    patternZigZagTop1x1.maxLength = patternZigZagTop1x1.coords.length;
    patternZigZagTop1x1.currentLength = 0;
    patternZigZagTop1x1.allowLimit = true;
    patternZigZagTop1x1.index = 0;
    patternZigZagTop1x1.indexAscending = true;
    
var patternZigZagDown1x1 = {};
    patternZigZagDown1x1.coords = [ { x:0, y:0 }, { x:1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:1 }  ];
    patternZigZagDown1x1.maxLength = patternZigZagDown1x1.coords.length;
    patternZigZagDown1x1.currentLength = 0;
    patternZigZagDown1x1.allowLimit = true;
    patternZigZagDown1x1.index = 0;
    patternZigZagDown1x1.indexAscending = true;
    
var patternZigZagLeft1x1 = {};
    patternZigZagLeft1x1.coords = [ { x:0, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:-1, y:0 } ];
    patternZigZagLeft1x1.maxLength = patternZigZagLeft1x1.coords.length;
    patternZigZagLeft1x1.currentLength = 0;
    patternZigZagLeft1x1.allowLimit = true;
    patternZigZagLeft1x1.index = 0;
    patternZigZagLeft1x1.indexAscending = true;
    
var patternZigZagRightt1x1 = {};
    patternZigZagRightt1x1.coords = [ { x:0, y:0 }, { x:0, y:-1 }, { x:1, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:-1 }, { x:1, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:-1 }, { x:1, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:-1 }, { x:1, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:-1 }, { x:1, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:-1 }, { x:1, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:-1 }, { x:1, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:-1 }, { x:1, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:-1 }, { x:1, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:-1 }, { x:1, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:-1 }, { x:1, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:-1 }, { x:1, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:-1 }, { x:1, y:0 }, { x:0, y:1 }, { x:1, y:0 } ];
    patternZigZagRightt1x1.maxLength = patternZigZagRightt1x1.coords.length;
    patternZigZagRightt1x1.currentLength = 0;
    patternZigZagRightt1x1.allowLimit = true;
    patternZigZagRightt1x1.index = 0;
    patternZigZagRightt1x1.indexAscending = true;

var patternSpiralLeftXXL = {};
		patternSpiralLeftXXL.coords = [ { x:0, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }  ];
    patternSpiralLeftXXL.maxLength = patternSpiralLeftXXL.coords.length;
    patternSpiralLeftXXL.currentLength = 0;
    patternSpiralLeftXXL.allowLimit = false;
    patternSpiralLeftXXL.index = 0;
    patternSpiralLeftXXL.indexAscending = true;
    
var patternSpiralRightXL = {};
		patternSpiralRightXL.coords = [ { x:0, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:0, y:1 }, { x:0, y:1 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:-1, y:0 } ];
    patternSpiralRightXL.maxLength = patternSpiralRightXL.coords.length;
    patternSpiralRightXL.currentLength = 0;
    patternSpiralRightXL.allowLimit = false;
    patternSpiralRightXL.index = 0;
    patternSpiralRightXL.indexAscending = true;
    
var patternEagle = {};
		patternEagle.coords = [ { x:0, y:0 }, { x:-1, y:0 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:1, y:0 }, { x:0, y:-1 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:1, y:0 }, { x:0, y:-1 }, { x:1, y:0 }, { x:1, y:0 }, { x:0, y:1 }, { x:0, y:1 }, { x:0, y:1 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:1 }, { x:-1, y:0 } ];
    patternEagle.maxLength = patternEagle.coords.length;
    patternEagle.currentLength = 0;
    patternEagle.allowLimit = false;
    patternEagle.index = 0;
    patternEagle.indexAscending = true;
    
var patternDiagonalTopLeft = {};
		patternDiagonalTopLeft.coords = [ { x:0, y:0 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:-1 }, { x:-1, y:0 }, { x:0, y:-1 }  ];
    patternDiagonalTopLeft.maxLength = patternDiagonalTopLeft.coords.length;
    patternDiagonalTopLeft.currentLength = 0;
    patternDiagonalTopLeft.allowLimit = true;
    patternDiagonalTopLeft.index = 0;
    patternDiagonalTopLeft.indexAscending = true;
    
var patternDiagonalTopRight = {};
		patternDiagonalTopRight.coords = [ { x:0, y:0 }, { x:1, y:0 }, { x:0, y:-1 }, { x:1, y:0 }, { x:0, y:-1 }, { x:1, y:0 }, { x:0, y:-1 }, { x:1, y:0 }, { x:0, y:-1 }, { x:1, y:0 }, { x:0, y:-1 }, { x:1, y:0 }, { x:0, y:-1 }, { x:1, y:0 }, { x:0, y:-1 }, { x:1, y:0 }, { x:0, y:-1 } , { x:1, y:0 }, { x:0, y:-1 } , { x:1, y:0 }, { x:0, y:-1 } , { x:1, y:0 }, { x:0, y:-1 } , { x:1, y:0 }, { x:0, y:-1 } , { x:1, y:0 }, { x:0, y:-1 } , { x:1, y:0 }, { x:0, y:-1 } , { x:1, y:0 }, { x:0, y:-1 } , { x:1, y:0 }, { x:0, y:-1 } , { x:1, y:0 }, { x:0, y:-1 }   ];
    patternDiagonalTopRight.maxLength = patternDiagonalTopRight.coords.length;
    patternDiagonalTopRight.currentLength = 0;
    patternDiagonalTopRight.allowLimit = true;
    patternDiagonalTopRight.index = 0;
    patternDiagonalTopRight.indexAscending = true;
    
var patternDiagonalBottomLeft = {};
		patternDiagonalBottomLeft.coords = [ { x:0, y:0 }, { x:-1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:1 }, { x:-1, y:0 }, { x:0, y:1 }  ];
    patternDiagonalBottomLeft.maxLength = patternDiagonalBottomLeft.coords.length;
    patternDiagonalBottomLeft.currentLength = 0;
    patternDiagonalBottomLeft.allowLimit = true;
    patternDiagonalBottomLeft.index = 0;
    patternDiagonalBottomLeft.indexAscending = true;
    
var patternDiagonalBottomRight = {};
		patternDiagonalBottomRight.coords = [ { x:0, y:0 }, { x:1, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:1 }, { x:1, y:0 }, { x:0, y:1 }  ];
    patternDiagonalBottomRight.maxLength = patternDiagonalBottomRight.coords.length;
    patternDiagonalBottomRight.currentLength = 0;
    patternDiagonalBottomRight.allowLimit = true;
    patternDiagonalBottomRight.index = 0;
    patternDiagonalBottomRight.indexAscending = true;
    
var patterns = [
	
	patternLineTop,
  patternLineDown,
  patternLineLeft,
  patternLineRight,
  patternRandom,
  patternSpiralLeft,
  patternSpiralRight,
  patternSquare3x3,
  patternCross1x1,
  patternCross2x2,
  patternCross3x3,
  patternCross4x4,
  patternHorseshoeUp1x1,
  patternHorseshoeDown1x1,
  patternHorseshoeLeft1x1,
  patternHorseshoeRight1x1,
  patternHorseshoeUp2x2,
  patternHorseshoeDown2x2,
  patternHorseshoeLeft2x2,
  patternHorseshoeRight2x2,
  patternHorseshoeUp3x3,
  patternHorseshoeDown3x3,
  patternHorseshoeLeft3x3,
  patternHorseshoeRight3x3,
  patternZigZagTop1x1,
  patternZigZagDown1x1,
  patternZigZagLeft1x1,
  patternZigZagRightt1x1,
  patternSpiralRightXL,
  patternSpiralLeftXXL,
  patternEagle,
  patternDiagonalTopLeft,
  patternDiagonalTopRight,
  patternDiagonalBottomLeft,
  patternDiagonalBottomRight
  
];

var patternCurrent;

//---

function init() {

	canvas = createCanvas( w , h , 'container' );
  
  path = createPath( LINE_COLOR, LINE_WIDTH, LINE_CAP);
  
  canvas.appendChild( path );

	counter = 0;
  halftime = false;

	lineHolderWidth = Math.floor( w / ( LINE_WIDTH + LINE_DISTANCE ) );
  lineHolderHeight = Math.floor( h / ( LINE_WIDTH + LINE_DISTANCE ) );

	for ( var x = 0; x < lineHolderWidth; x++ ) {
  
  	lineHolder[ x ] = [];
    
    for ( var y = 0; y < lineHolderHeight; y++ ) {
    
      lineHolder[ x ][ y ] = 0;
    
    }
  
  }
  
  var newArrayPositionObject = getRandomDir( getRandomStartPos() );

  drawLine( 'M', newArrayPositionObject.position );
  
  interval = setInterval( function() { 
  
  	drawLine( 'L', posHolder );
    
    counter++;
    
    if ( counter > ( lineHolder.length * lineHolder[ 0 ].length ) / 2 ) {
    //if ( counter > ( lineHolder.length * lineHolder[ 0 ].length ) - ( ( lineHolder.length * lineHolder[ 0 ].length ) / 4 ) ) {
    
  		halftime = true;
      
    }
    
    if ( counter >= lineHolder.length * lineHolder[ 0 ].length - 2 ) {//-2 because of the line at the beginning
    
    	console.log( 'checkEnd: ', checkEnd(), ' - ', counter, ' - ', lineHolder.length * lineHolder[ 0 ].length );
    
    	if ( checkEnd() ) {
      
      	clearInterval( interval );
        closePath();
      
      }
    
    }
    
  }, SPEED );
  
  //---
  
  btSaveSVG = document.getElementById( 'btSaveSVG' );
  btSaveSVG.addEventListener( 'mousedown', btSaveSVGHandler, false );

};

//---

function btSaveSVGHandler( e ) {

	saveSvg( canvas, 'Doodle.svg' );

};

function saveSvg( svgEl, name ) {

    svgEl.setAttribute( 'xmlns', 'http://www.w3.org/2000/svg' );
    
    var svgData = svgEl.outerHTML;
    var preface = '<?xml version="1.0" standalone="no"?>\r\n';
    var svgBlob = new Blob( [ preface, svgData ], { type:'image/svg+xml;charset=utf-8'} );
    var svgUrl = URL.createObjectURL( svgBlob );
    var downloadLink = document.createElement( 'a' );
    
    downloadLink.href = svgUrl;
    downloadLink.download = name;
    
    document.body.appendChild(downloadLink);
    downloadLink.click();
    document.body.removeChild(downloadLink);
    
}

//---

function checkEnd() {

	for ( var x = 0; x < lineHolderWidth; x++ ) {

    for ( var y = 0; y < lineHolderHeight; y++ ) {

      if ( lineHolder[ x ][ y ] === 0 ) {
      
      	return false;
      
      }
    
    }
  
  }
  
  return true;

};

//---

function drawLine( command, position ) {

	var oldArrayPosition = position;
  var newArrayPositionObject = getRandomDir( oldArrayPosition );
  
  var newCanvasPosition = getCanvasPosition( newArrayPositionObject.position );
  
  if ( newArrayPositionObject.draw ) {
  
  	if ( command === 'M' ) {
    
    	changePath( command, getCanvasPosition( oldArrayPosition ) );
      changePath( 'L', newCanvasPosition );
    
    } else if ( command === 'L' ) {
    	
      changePath( command, newCanvasPosition );
    
    } 

	} else {
    
  	changePath( 'M', newCanvasPosition );
    changePath( command, newCanvasPosition );
    
  }
  
  posHolder = newArrayPositionObject.position;
  
};

//---

function getCanvasPosition( position ) {

	return { x:position.x * ( LINE_WIDTH + LINE_DISTANCE ) + LINE_WIDTH, y:position.y * ( LINE_WIDTH + LINE_DISTANCE ) + LINE_WIDTH };

};

function getRandomStartPos() {

	var x = Math.floor( Math.random() * lineHolder.length );
  var y = Math.floor( Math.random() * lineHolder[ 0 ].length );

	return { x:x, y:y };

};

function getRandomDir( position ) {

	var newPositionObject = {};
	var newPositions = [];

	if (!patternCurrent) {
  
  	setRandomPattern();
  
  }
  
  //console.log( patternCurrent );
  
  if ( patternCurrent === patternRandom ) {
  
  	if ( position.x - 1 > -1 && position.x - 1 < lineHolderWidth && lineHolder[ position.x - 1 ][ position.y ] === 0 ) {
  
      newPositions.push( { x:position.x - 1, y:position.y } );

    }

    if ( position.x + 1 > -1 && position.x + 1 < lineHolderWidth && lineHolder[ position.x + 1 ][ position.y ] === 0 ) {

      newPositions.push( { x:position.x + 1, y:position.y } );

    }

    if ( position.y - 1 > -1 && position.y - 1 < lineHolderHeight && lineHolder[ position.x ][ position.y - 1 ] === 0 ) {

      newPositions.push( { x:position.x, y:position.y - 1 } );

    }

    if ( position.y + 1 > -1 && position.y + 1 < lineHolderHeight && lineHolder[ position.x ][ position.y + 1 ] === 0 ) {

      newPositions.push( { x:position.x, y:position.y + 1 } );

    }
  
  } else {
  
  	var p;
    
    if ( patternCurrent.indexAscending ) {
    
    	p = patternCurrent.coords[ patternCurrent.index ];
    
    } else {
    
    	p = patternCurrent.coords[ 0 ];
    
    }
    
    //patternCurrent.position.x += position.x + p.x;
    //patternCurrent.position.y += position.y + p.x;
    
    if ( position.x + p.x > -1 && position.x + p.x < lineHolderWidth && position.y + p.y > -1 && position.y + p.y < lineHolderHeight && lineHolder[ position.x + p.x ][ position.y + p.y ] === 0 ) {

      newPositions.push( { x:position.x + p.x, y:position.y + p.y } );

    }
  
  }
	
  patternCurrent.index++;
  
  //console.log( patternCurrent.index, patternCurrent.maxLength );
  
  
  
  if ( patternCurrent.index === patternCurrent.currentLength ) {
  	
    patternCurrent.index = 0;
    patternCurrent.currentLength = 0;
  	patternCurrent = null;
    
    tidyUpPatterns();
    
    //console.log("NEXT");
    //clearInterval( interval );
  
  }
  
  if ( newPositions.length === 0 ) {
  
    newPositionObject.draw = false;
    
    if ( halftime ) {

      newPositionObject.position = getPosNearBy( position, lineHolder.length * lineHolder[ 0 ].length );
    
    } else {
    
    	newPositionObject.position = getPosRandomly( position, lineHolder.length * lineHolder[ 0 ].length );
    
    }
    
  } else {
  
  	newPositionObject.draw = true;

    if ( newPositions.length === 1 ) {
    
    	newPositionObject.position = newPositions[ 0 ];
    
    } else if ( newPositions.length > 1 ) {
      
      newPositionObject.position = newPositions[ Math.floor( Math.random() * newPositions.length ) ];
    
    }
  
  }

  lineHolder[ newPositionObject.position.x ][ newPositionObject.position.y ] = 1;

  return newPositionObject;

};

function getPosRandomly( position ) {

	var newPositions = [];
  
  for ( var x = 0; x < lineHolderWidth; x++ ) {

    for ( var y = 0; y < lineHolderHeight; y++ ) {

      if ( lineHolder[ x ][ y ] === 0 ) {
      
      	newPositions.push( { x:x, y:y } );
      
      }
    
    }
  
  }
  
  return newPositions[ Math.floor( Math.random() * newPositions.length ) ];

};

function getPosNearBy( position, maxRadius = 100 ) {

	for ( var radius = 1; radius < maxRadius; radius++ ) {
  
  	var newPositions = [];
  
  	var xs = position.x - radius;
    var ys = position.y - radius;
    var xe = position.x + radius;
    var ye = position.y + radius;

    for ( var x = xs; x < xe; x++ ) {

      for ( var y = ys; y < ye; y++ ) {

        if ( x > -1 && x < lineHolderWidth && y > -1 && y < lineHolderHeight && lineHolder[ x ][ y ] === 0 ) {

          newPositions.push( { x:x, y:y } );

        }

      }

    }
    
    if ( newPositions.length === 1 ) {
    
    	return newPositions[ 0 ];
    
    } else if ( newPositions.length > 1 ) {
      
      return newPositions[ Math.floor( Math.random() * newPositions.length ) ];
    
    }
  
  }

};

//---

function setRandomPattern() {

	if ( halftime ) {
  
		patternCurrent = patternRandom;
    
  } else {
  
  	patternCurrent = patterns[ Math.floor( Math.random() * patterns.length ) ];
  
  }
  
  if ( patternCurrent.allowLimit ) {
  
  	patternCurrent.currentLength = Math.floor( Math.random() * ( patternCurrent.maxLength - 5 ) ) + 5;//min length 5
  
  } else {
  
  	patternCurrent.currentLength = patternCurrent.maxLength;
  
  }
  
};

function tidyUpPatterns() {

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

		var pattern = patterns[ i ];
    		pattern.index = 0;
        pattern.currentLength = 0;
  
  }

};

//---

function createCanvas( width, height, containerId ) {

  var canvas = document.createElementNS( 'http://www.w3.org/2000/svg', 'svg' );
      canvas.setAttribute( 'width', width );
      canvas.setAttribute( 'height', height );
	
  var container = document.getElementById( containerId );
  		container.appendChild( canvas );
      
  return canvas;

};

function createPath( color, w, lineCap ) {

	var path = document.createElementNS( 'http://www.w3.org/2000/svg', 'path' );
  		path.setAttribute( 'd', '' );
  		path.setAttribute( 'stroke', color );
      path.setAttribute( 'stroke-width', w );
      path.setAttribute( 'stroke-linecap', lineCap );
      path.setAttribute( 'fill', 'transparent' );
      
  return path;

};

function changePath( command, position ) {

	pathCoordinates += command + ' ' + position.x + ' ' + position.y + ' ';
  path.setAttribute( 'd', pathCoordinates );

};

function closePath() {

	pathCoordinates += 'Z';
  path.setAttribute( 'd', pathCoordinates );
  
};
  
//---

init();
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