// GenericAnimation.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class GenericAnimation extends JApplet implements ActionListener {

    private int animationDelay = 50;  // millisecond delay
    private Timer animationTimer;     // Timer drives animation
    private int x, y;

   // respond to Timer's event
   public void actionPerformed( ActionEvent actionEvent )
   {
      repaint(); // repaint animator
   }

   // start or restart animation
   public void startAnimation()
   {
      if ( animationTimer == null ) {
         animationTimer = new Timer( animationDelay, this );
         animationTimer.start();
      }
      else // continue from last image displayed
         if ( ! animationTimer.isRunning() )
            animationTimer.restart();
   }

   // stop animation timer
   public void stopAnimation()
   {
      animationTimer.stop();
   }

    public void init() {
	startAnimation();  // begin animation
   } 

    public void paint (Graphics g) {
	super.paint(g);
	g.fillOval(x++,y++,10,10);
    }
}