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<html>
<head>
<meta charset="utf-8">
<title>3D Building (three.js)</title>
<link type="text/css" href="index.css" rel="stylesheet"/>
<script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r69/three.min.js"></script>
<script src="https://cdn.jsdelivr.net/gh/mrdoob/three.js/r69/examples/js/loaders/colladaloader.js"></script>
</head>
<body>
<script src="index.js"></script>
</body>
</html>
Modified http://cdnjs.cloudflare.com/ajax/libs/three.js/r69/three.min.js to a secure url
Updated missing url https://cdn.rawgit.com/mrdoob/three.js/r69/examples/js/loaders/ColladaLoader.js to https://cdn.jsdelivr.net/gh/mrdoob/three.js/r69/examples/js/loaders/colladaloader.js
https://cdnjs.cloudflare.com/ajax/libs/three.js/r69/three.min.js
https://cdn.rawgit.com/mrdoob/three.js/r69/examples/js/loaders/ColladaLoader.js