proportional circle area chart; sketch based of this super vis on Working Parents by Nathan Yau
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<html lang="en">
<head>
<meta charset="utf-8">
<style>
body { font-family: Consolas, monaco, monospace; background: #e0e5db;}
</style>
</head>
<body>
<svg width="960" height="450">
<g id="vis" transform="translate(10, 10)"></g>
</svg>
<script src="https://d3js.org/d3.v4.min.js"></script>
<!-- d3 code -->
<script src=".script-compiled.js" charset="utf-8"></script>
<!-- render code -->
<script>
d3.interval(function() {
return render(Math.floor(d3.randomUniform(15, 100)()));
}, 1000);
</script>
</body>
</html>
https://d3js.org/d3.v4.min.js