the heart of the code for updating highcharts chart

battlegram.js snippet

function updateData() {
  for (i=0; i<2; i++) {
    chart.series[i == 0 ? 1 : 0].setData(thedata[roundNum][i]);
  }
  if (roundNum < thedata.length-1) {
    roundNum++;
  }
  setTimeout(updateData, 15);
}