/**
  * Called when the currently active experiment's SimClock is advanced
  *
  * @param e SimRunEvent: A SimRunEvent.
  */
 public void clockAdvanced(SimRunEvent e) {
   SimTime currentTime = e.getSimTime();
   double timePercent =
       (currentTime.getTimeValue() / expRunner.getExperiment().getStopTime().getTimeValue()) * 100;
   experimentGUI.clockAdvanced(currentTime.toString(3), timePercent, startTime);
 }