<!doctype html>
<html>
<head>
	<title>D3 tutorial</title>
	<!-- <script type="text/javascript" src="http://d3js.org/d3.v3.min.js"></script> -->
	<script type="text/javascript" src="/z-resources/d3.v3.min.js"></script>
</head>
<body>
	<p>Demo</p>

	<script type="text/javascript">
	d3.select("title")
	.text("Demo for Stage 8...");

	var smallData = [100, 150];
	var map_same = function(_data){return _data}

	var canvas = d3.select("body")
					.append("svg")
					.attr("width", 500)
					.attr("height", 500);
