80'
        }]
      },
      legend: {
        enabled: false
      },
      exporting: {
        enabled: false
      },
      series: [{
        name: 'sent',
        data: (function () {
          var data = [],
              time = (new Date()).getTime(),
              i;

          for (i = -19; i <= 0; i += 1) {
            data.push({
              x: time + i * 1000,
              y: 0
            });
          }
          return data;
        }())
      }]
    });
  </script>


</body>
</html>
