Chart

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset='utf-8' />
<script src="https://d3js.org/d3.v3.min.js"></script>
</head>
<body>
<div class="container" role="main">
<div class="sections">
<article>
<script>
var dataset = [25,10,40,12.5, 12.5];

//Width and height
var w = 300;
var h = 300;

// outer radius of the pie is half the width
var outerRadius = w / 2;

//draws wedges
var arc = d3.svg.arc()
.innerRadius(100) //zero for a pie chart - but if you put a non-zero number in you get a ring chart
.outerRadius(outerRadius);

// define default pie layout
var pie = d3.layout.pie();

//make the SVG, put it before the end of the article element, set its width & height
var svg = d3.select("article")  
.append("svg")
.attr("width", w)
.attr("height", h);

//Set up groups (g)
var arcs = svg.selectAll("g.arc") // not created yet
.data(pie(dataset)) //bind data to a group
.enter()
.append("g")
.attr("transform", "translate(" + outerRadius + "," + outerRadius + ")"); // put the group into place

//Draw arc paths
arcs.append("path")
.attr("fill", function(d,i) {
return "rgb(221, 65," + (i * 36) +" )"; //make a fill based on 'Tangerine Tango', Pantone Colour of the year for 2012 #DD4124
})
.attr("d", arc);

//Labels
arcs.append("text")
.attr("transform", function(d) {
return "translate(" + arc.centroid(d) + ")";
})
.attr("text-anchor", "middle")
.attr("font-family", "Helvetica")
.attr("font-size", "12px")
.attr("fill", "white")
.text(function(d) {
return d.value;
});
</script>

</article>
</div>
</div>
</body>
</html>

Modified http://d3js.org/d3.v3.min.js to a secure url

https://d3js.org/d3.v3.min.js