import java.applet.Applet;
import java.awt.*;
public class Fraktal extends Applet{
  double kontroll(int x1, int y1, int x2, int y2){
    return Math.sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1));
  }
  void joonista(Graphics g, int x1, int y1, int x2, int y2){
	g.setColor(Color.blue);
    int y3=y2+(x1-x2)/2;
    int x3=x2-(y1-y2)/2;
    int y4=y2-(y1-y2)/2;
    int x4=x2-(x1-x2)/2;
    int y5=y2-(x1-x2)/2;
    int x5=x2+(y1-y2)/2;
    g.drawLine(x1, y1, x2, y2);
    g.drawLine(x2, y2, x3, y3);
    g.drawLine(x2, y2, x4, y4);
    g.drawLine(x2, y2, x5, y5);
    try{Thread.sleep(50);}catch(Exception e){}
    if(kontroll(x1, y1, x3, y3)>10){
      joonista(g, x2, y2, x3, y3);
      joonista(g, x2, y2, x4, y4);
      joonista(g, x2, y2, x5, y5);
    }
  }
  public void paint(Graphics g){
     joonista(g, 300, 600, 300, 400);
  }
 public static void main(String argumendid[]){
   Frame f=new Frame("Puu4");
   f.add(new Fraktal());
   f.setSize(600, 600);
   f.setVisible(true);
   f.setBackground(new Color(0, 0, 0));  
   //f.addWindowListener(new Nupud());
  }
}