//Applet code to move object form left to right.

import java.awt.*;
import java.applet.*;
import java.lang.Thread;
import java.lang.*;

public class Applet1 extends Applet
{
Thread t;
int i;
int x=14,y=14;

        public void init()
        {
         t=new Thread();
        }
public void paint(Graphics g)
{
for(x=14;x<=getWidth();x=x+5)
        {
g.setColor(Color.BLACK);
g.fillRect(0,0,getWidth(),getHeight());
g.setColor(Color.RED);
g.fillOval(x,y,40,40);
repaint();
        try
{
t.sleep(50);
}
catch(Exception e)
{}
        }
        }
}

execution step:--

c:\javac Applet1.java

c:\appletviewer Applet1