From introtowebgl on nodeschool excercise 2 it wants you to create a little animation moving the camera closer to the cube so I made one which goes in and out, in and out for as long as your looking at that tab.
http://nodeschool.io/#intro-to-webgl
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<html>
<head>
<title>Intro to WebGL with three.js</title>
</head>
<body>
<div id="webgl-container"></div>
<script src="//cdnjs.cloudflare.com/ajax/libs/three.js/r68/three.js"></script>
<script src="camzoom.js"></script>
</body>
</html>
https://cdnjs.cloudflare.com/ajax/libs/three.js/r68/three.js