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

public class rectri extends JFrame
{
    public int width;
    public int height;
    public Graphics brush;  // object that enables drawing
    
    // constructor
    public rectri(int w, int h)
    {
	width =w;  height = h;
	setBounds(0,0,width,height);
	setVisible(true); // displaying the window
	setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	brush = getGraphics(); 
	brush.setColor(Color.white);
	try { Thread.sleep(500); } catch (Exception e) {} // delays program for 500ms
	brush.fillRect(0,0,width,height); // draws solid rectangle
	brush.setColor(Color.blue);
	triangle(width/2,50,24,height-24,width-24,height-24);
    }

    public void triangle(int x1, int y1, int x2, int y2, int x3, int y3)
    {


	brush.drawLine(x1,y1,x2,y2);
	brush.drawLine(x2,y2,x3,y3);
	brush.drawLine(x1,y1,x3,y3);
	int lx = (x1+x2)/2;
	int ly = (y1+y2)/2;
	int rx = (x1+x3)/2;
	int ry = (y1+y3)/2;
	int bx = (x2+x3)/2;
	int by = (y2+y3)/2;
        if (Math.abs(x2-x3)>=4)
	    {
		triangle(x1,y1,lx,ly,rx,ry);
		triangle(lx,ly,x2,y2,bx,by);
		triangle(rx,ry,bx,by,x3,y3);
	    }
    }


    public static void main(String[] args)
    {
	rectri T = new rectri(800,600);
    }


}