import java.awt.*;
import java.applet.*;

public class Animator extends Applet implements Runnable{
	Thread runner;
	int x,y;
	
	public void init(){
		x= y = 0;
	}
		public void start(){
		runner = new Thread(this);
		runner.start();
	}
	public void run(){
		while(true){
			x +=4;
			y +=4;  //將x , y移到新的位置上。
			repaint();
			if(x>200)  return;
			try{
				Thread.sleep(250);
			}catch(InterruptedException e){
				}
		}
	}
	public void paint(Graphics g){
		g.fillOval(x,y,30,20);
	}
}