Concentric circles

A simple example which uses d3.js to create a set of concentric circles according to a given array of radii.

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<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <meta name="description" content="Concentric circles"/>
    <title>Concentric circles</title>
    <link type="text/css" href="index.css" rel="stylesheet"/>
    <script src="https://d3js.org/d3.v3.min.js"></script>
  </head>
  <body>
    <svg width="960" height="500">
    </svg>
  </body>
  <script src="index.js"></script>
</html>
    

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

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