import java.applet.*;
import javax.swing.*;
import java.awt.*;

public class Circles extends JApplet {

    public void paint(Graphics g) {
	g.setColor(new Color(0,0,80));
	g.fillRect(0,0, 500, 500);
	g.setColor(new Color(255,255,0));
	
	Color color;
	float  red, green, blue;
	for (int y=0; y<500; y+=100) {
	    for (int x=0; x<500; x+=100) {
		red = (float) Math.random();
		green = (float) Math.random();
		blue = (float) Math.random();
		color = new Color(red, green, blue);
		g.setColor(color);
		g.fillArc(x , y, 45, 45, 45, 270 );
	    }
	}
    }
}