Hexagon whirl

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<!DOCTYPE HTML>
<html lang="en">
<head>
  <script src="https://d3js.org/d3.v3.min.js" charset="utf-8"></script>
  <script src="whirl.js"></script>
  <style>
    path {
        fill: none;
        stroke: maroon;
    }
    svg {
        display: block;
        margin: 0 auto;
    }
  </style>
</head>
​
<body>
<script>
hexwhirl(300);
</script>
</body>
</html>
​
    

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

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