import java.awt.*;
import java.util.*;
import java.awt.event.*;
import java.applet.*;

public class Lauri extends Applet implements MouseListener{

int raadius = 100;

   public Lauri(){
     addMouseListener(this);
   }

   public void mousePressed(MouseEvent e){
     int x=e.getX();
     int y=e.getY();
     if((x - raadius)*(x - raadius) + (y - raadius)*(y - raadius) <= raadius*raadius){ 
       double vahe=0.5;
       Graphics g=this.getGraphics();
       joonista(g, x - raadius, y - raadius);
     }
   }
   public void mouseReleased(MouseEvent e){}
   public void mouseEntered(MouseEvent e){}
   public void mouseExited(MouseEvent e){}
   public void mouseClicked(MouseEvent e){}

   void joonista(Graphics g, int iks, int igrek){
    double nurk;
    int a,b;
   
    int pikkus = (int)Math.sqrt(iks*iks + igrek*igrek); 
    if(iks>0 & igrek>0){
       nurk = Math.PI / 2 * igrek/(iks + igrek); 
      }
       else
      {
       nurk = 45;
      }
   
    for(int x=0; x<1000; x=x+2){
      g.setColor(Color.black);               //joonistatakse must ring
      g.drawOval(x, 0, 2*raadius, 2*raadius);
        nurk = nurk + (Math.PI * 4 / (2 * Math.PI * raadius) );
      a = (int)(((pikkus) * Math.cos(nurk)) + x + raadius);
      b = (int)(((pikkus) * Math.sin(nurk)) + raadius);
      
      g.drawRect(a, b, 1, 1);  // joonistatakse yx punkt jäljest...
      try{Thread.sleep(8);}
      catch(Exception e){}                   //oodatakse veidi
      g.setColor(Color.white);               //ning kustutatakse see
      g.drawOval(x, 0, 2*raadius, 2*raadius);             //valgega üle joonistades
    }
   }
   
   public void paint(Graphics g){
      g.setColor(Color.black);               //joonistatakse must ring
      g.drawOval(0, 0, 2*raadius, 2*raadius);  
   }

   public static void main(String argumendid[]){
     Frame f=new Frame();
     f.add(new Lauri());
     f.setSize(1000, 300);
     f.setVisible(true);
   }
}