import java.applet.Applet;
import java.awt.*;
public class Puu extends Applet{
  double kaugus(int x1, int y1, int x2, int y2){
    return Math.sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1));
  }
  void joonistaPuu(Graphics g, int x1, int y1, int x2, int y2){
    int x3=x1+(x2-x1)/2+(y2-y1)/2;
    int y3=y1+(y2-y1)/2-(x2-x1)/2;
    g.drawLine(x1, y1, x2, y2);
    g.drawLine(x1, y1, x3, y3);
    g.drawLine(x3, y3, x2, y2);
    try{Thread.sleep(500);}catch(Exception e){}
    if(kaugus(x1, y1, x3, y3)>10){
      joonistaPuu(g, x1, y1, x3, y3);
      joonistaPuu(g, x3, y3, x2, y2);
    }
  }
  public void paint(Graphics g){
     joonistaPuu(g, 130, 290, 170, 290);
  }
}