void PlotWindow::setupRealtimeDataDemo(QCustomPlot *customPlot)
{
  customPlot->addGraph(); // blue line
  customPlot->graph(0)->setPen(QPen(Qt::blue));
  customPlot->graph(0)->setBrush(QBrush(QColor(240, 255, 200)));
  customPlot->graph(0)->setAntialiasedFill(false);

  customPlot->addGraph(); // blue dot
  customPlot->graph(1)->setPen(QPen(Qt::blue));
  customPlot->graph(1)->setLineStyle(QCPGraph::lsNone);
  customPlot->graph(1)->setScatterStyle(QCPScatterStyle::ssDisc);

  customPlot->xAxis->setTickLabelType(QCPAxis::ltDateTime);
  customPlot->xAxis->setDateTimeFormat("hh:mm:ss");
  customPlot->xAxis->setAutoTickStep(false);
  customPlot->xAxis->setTickStep(2);
  customPlot->axisRect()->setupFullAxesBox(true);
  customPlot->yAxis->setRange(-80,80);
}