Made the play button reset the simulation if finished.

src/ui/view/TimePanel.java

@@ -159,6 +159,7 @@ public class TimePanel extends JPanel implements ActionListener{
 		playBtn.addActionListener(new ActionListener() {
 			@Override
 			public void actionPerformed(ActionEvent e) {
+				if(model.getCurIteration()==model.getIterations()-1)timeSlider.setValue(timeSlider.getMinimum());
 				running = !running;
 				controller.setIsSimRunning(running);
 				if (running) {