<html>
  <head>
    <link href="/css/c3.css" rel="stylesheet" type="text/css">
  </head>
  <body>
    <div id="chart1"></div>
    <div id="chart2"></div>
    <div id="chart3"></div>

    <script src="http://d3js.org/d3.v4.min.js" charset="utf-8"></script>
    <script src="/js/c3.js"></script>
    <script>

      var chart1 = c3.generate({
        bindto: '#chart1',
        data: {
          columns: [
            ['data1', 300, 350, 300, 0, 0, 100],
            ['data2', 130, 0, 140, 200, 0, 50],
          ],
          type: 'area-spline',
          groups: [['data1', 'data2']],
        }
      });

      var chart2 = c3.generate({
        bindto: '#chart2',
        data: {
          columns: [
            ['data1', -300, -350, -300, 0, 0, -100],
            ['data2', -130, 0, -140, -200, 0, -50]
          ],
          type: 'area-spline',
          groups: [['data1', 'data2']],
        }
      });

      var chart3 = c3.generate({
        bindto: '#chart3',
        data: {
          columns: [
            ['data1', -300, 350, -300, 0, 0, 100],
            ['data2', -130, 0, 140, -200, 150, -50]
          ],
          type: 'area-spline',
          groups: [['data1', 'data2']],
        }
      });

    </script>
  </body>
</html>
