<html>
  <head>
    <link rel="stylesheet" type="text/css" href="/css/c3.css">
  </head>
  <body>
    <div id="chart"></div>

    <script src="http://d3js.org/d3.v4.min.js" charset="utf-8"></script>
    <script src="/js/c3.js"></script>
    <script>
      var chart = c3.generate({
        data: {
          columns: [
            ['data1'],
            ['data2'],
          ],
        },
        axis: {
          y: {
            default: [-100, 100]
          }
        }
      });
    </script>
  </body>
</html>
