Here's the whole thing! 

<!doctype html>
<html>
<head>
    <meta charset="utf-8" />
    <title>Snowy Tutorial</title>

    <link href="main.css" rel="stylesheet" />
    <script src="http://code.createjs.com/createjs-2013.12.12.min.js"></script>

<!-- This Tutorial was made by Andrea Kereliuk for Sheridan's IMM program, 2014-2015 -->

    <script>

    window.addEventListener("load", init);

    function init() {

        var stage = new createjs.Stage("myCanvas");



        setInterval(snowBegin, 200);

        function snowBegin() {

            var snowflake = new createjs.Bitmap("snowflakeS.png");


            var container = new createjs.Container();

            container.addChild(snowflake);

            container.x = Math.random()*window.innerWidth;



            var duration = Math.random()*1000+1000;

            createjs.Tween.get(snowflake, {loop:true})
            .to({x:0, alpha:1}, createjs.Ease.quadInOut)
            .wait(15)
            .to({x:25, alpha:1}, duration, createjs.Ease.quadInOut)
            .wait(15)
            .to({x:0, alpha:1}, duration, createjs.Ease.quadInOut);

            stage.addChild(container);

            createjs.Tween.get(container, {loop:true})
            .to({y:window.innerHeight}, 10000, createjs.Ease.BackOut)
            .call(removeContainer);


            createjs.Ticker.on("tick", stage).setInterval(5);

        }

        function removeContainer(e) {
        stage.removeChild(e.target);
        }


    }

    </script>



</head>


<body id="demo">



<canvas id="myCanvas">alternative content</canvas>
<script>
    var canvas = document.getElementById("myCanvas");
    canvas.width  = window.innerWidth;
    canvas.height = window.innerHeight;
</script>


<!-- CONTENT GOES HERE -->



</body>


</html>