Unit 4: Design

import javax.swing.JFrame;
import java.awt.*;
public class squares extends JFrame
{
public void paint (Graphics g) //paint class
    {
        super.paint(g);
        g.setColor(Color.CYAN); //setting background color
        g.fillRect(0,0,200,300); //filling background with color cyan
        SquareMethod(g,50,50,20,20); //calling method
        g.setColor(Color.BLACK);
        g.drawLine(50,50,150,150); //drawing black diagonal line
    }
public static void SquareMethod(Graphics g, int x, int y, int w, int h) //method to make the squares
   {
       for (int i=1;i<=5;i++)
       {
           g.setColor(Color.RED);
           g.drawRect(x,y,20*i,20*i);
        }
   }
public static void main (String [] args) //frame
    {
       squares app = new squares();
       app.setSize(200,300);
       app.setVisible(true);
}
}