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<head>
<meta charset="utf-8">
<script src="https://d3js.org/d3.v4.min.js"></script>
<style>
body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
</style>
</head>
<body>
<svg></svg>
<script>
var size = 400
var padding = 40
var data = [1, 1, 2, 5, 8, 12, 15, 21]
var colors = d3.scaleOrdinal(d3.schemeCategory20);
// create pie angles from data
var pie = d3.pie()(data)
console.log(pie)
// setup arc function
var arc = d3.arc()
.innerRadius(0)
.outerRadius(size / 2 - padding)
.startAngle(d => d.startAngle)
.endAngle(d => d.endAngle)
// render to svg
var svg = d3.select("svg")
.attr("width", size)
.attr("height", size)
svg.append("g")
.attr('transform', 'translate('+size/2+', '+size/2+')')
.selectAll('path')
.data(pie).enter().append('path')
.attr('d', arc)
.attr('fill', d => colors(d.index))
.attr('stroke', '#fff')
</script>
</body>
https://d3js.org/d3.v4.min.js