Simple Java Animation Using Threads

import java.awt.*; 
import java.applet.*; 
public class TestAnim1 extends Applet implements Runnable {
   //Declare a Thread object 
  Thread count;
	int x ;
	int y;
	// initialise applet
  public void init()
  {
	  x = 0;
	  y = 20;
	setBackground(Color.yellow); 
  	// init thread
    count = new Thread(this);
    //start the thread
    count.start();
  }
  //Thread code , overrides run method of Runnable
  public void run()
  {
    while(true)
    {
      try
      {
	      // delay
        count.sleep(100); 
        x++;
        // call paint method 
        repaint();
      }
      catch(Exception e) {} //do nothing
    }
   }
	// paint method
  public void paint(Graphics g){
	  g.setColor(Color.green);
	  g.fillOval(x,y, 30,30);
  }
}