//CirclesLab.java
import java.awt.Graphics;
import java.awt.Color;
import javax.swing.*;

public class CirclesLab extends JApplet {

   public void paint( Graphics g )
   {
       super.paint( g );

       int x1=0, y1=0, width, height, circles=10, gap=10;
       width = getWidth()-10;
       height = getHeight()-10;

       for (int i=0; i<circles; i++) {
	   x1 += gap; 
	   y1 += gap; 
	   width -= 2*gap;
	   height -= 2*gap;
 	   g.setColor(new Color((int)(Math.random()*256),
				(int)(Math.random()*256),
				(int)(Math.random()*256)));
	   g.fillOval(x1,y1,width,height);
       }
   }
}