Creating a cube applet

[ATB]

package assignment7;

import java.awt.*;

public class Exercise5 
{
	public void paint(Graphics g)
	{
		g.drawRect(30, 50, 50, 50); 
		g.drawLine(30,50,40,40); 
		g.drawLine(80,50,90,40); 
		g.drawLine(40,40,90,40); 
		g.drawLine(80,100,90,90); 
		g.drawLine(90,40,90,90);
	}
	public static void main(String args[])
	{
	
	}
}

i got how to create the cube, but how do i loop the drawline?
i am supposed to only have one ?