import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
public class Koridor4 extends Applet implements AdjustmentListener{
 Scrollbar sb=new Scrollbar(Scrollbar.VERTICAL, 20, 10, 2, 200);
 public Koridor4(){
   setLayout(new BorderLayout());
   add(sb, BorderLayout.WEST);
   sb.addAdjustmentListener(this);
 }
 void joonistaKoridor(Graphics g, int x, int y, int laius, int korgus){
  g.drawRect(x, y, laius, korgus);
  if(laius>7){
    joonistaKoridor(g, x+laius/8,   y+korgus/4, laius/4, korgus/2);
    joonistaKoridor(g, x+laius*5/8, y+korgus/4, laius/4, korgus/2);        
  }
 }
 public void paint(Graphics g){
   int nr=sb.getValue();
   joonistaKoridor(g, 220-nr, 220-nr, 2*nr, 2*nr);
 }
 
 public void adjustmentValueChanged(AdjustmentEvent e){
   repaint();
 }
 
 public static void main(String argumendid[]){
   Frame f=new Frame("Koridor");
   f.add(new Koridor4());
   f.setSize(400, 400);
   f.setVisible(true);
 }
}