import java.awt.Container;
import java.awt.Graphics;

import javax.swing.JFrame;
import javax.swing.JPanel;


public class oppg3 extends JFrame {

    public oppg3(){


        this.setSize(1200, 1200);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setLocationRelativeTo(null);


        Container contentPane = getContentPane();
        contentPane.add(new Panel2());
        this.setVisible(true);
    }

    class Panel2 extends JPanel{

        double p = 0.95;
        int x0= 50;
        int y0 = 50;
        int xtemp = 0;
        int ytemp = 0;

        int x1 = 350;                   int y1=50;
        int x2=350;                     int y2=350;
        int x3=50;                      int y3=350;


        public void paintComponent(Graphics g){

            super.paintComponents(g);



            for (int n = 0; n < 3; n++) {


                for (int j = 0; j < 3; j++) {

                    //x0 =y0 = x3 = y1 = 350*j;
                    //x1 = x2 = y2 = y3 = 350*j+350;
                    p = 1-p;

                    x0 = x3 = 50+300*j;
                    x1 = x2 = 350 +300 * j;

                    y0 = y1 = 50+300*n;
                    y2 = y3 = 350 + 300*n;


                    for (int i = 0; i < 45; i++) {


                        xtemp = x0; ytemp = y0;

                        g.drawLine(x0, y0, x1, y1);
                        g.drawLine(x1, y1, x2, y2);
                        g.drawLine(x2, y2, x3, y3);
                        g.drawLine(x3, y3, x0, y0);

                        x0 = (int)Math.round((x1-x0)*p+x0);
                        y0 = (int) Math.round((y1-y0)*p+y0);
                        x1 = (int)Math.round((x2-x1)*p+x1);
                        y1 = (int)Math.round((y2-y1)*p+y1);
                        x2 = (int)Math.round((x3-x2)*p+x2);
                        y2 = (int)Math.round((y3-y2)*p+y2);
                        x3 = (int)Math.round((xtemp -x3)*p+x3);
                        y3 = (int)Math.round((ytemp-y3)*p+y3);
                    }

                }
            }
        }
    }


}