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

public class rendzu extends Applet implements MouseListener{
int asi=0;
int[][] ruudud = new int[20][20];
	public rendzu(){
	addMouseListener(this);	
	}
	public  void paint (Graphics g){
		for(int f=0; f<20; f++){
			for(int d=0; d<20; d++){
			g.drawRect(f*20+40,d*20+20,20,20);	
			}
		}
		for (int f=0; f<20; f++){
			for (int h=0; h<20; h++){
				if (ruudud[h][f]==2){
				g.fillOval(h*20+42,f*20+22,17,17);
				}
				if (ruudud[h][f]==1){
				g.fillRect(h*20+42,f*20+22,17,17);
				}			
			
			}
		}

	}
	public void mousePressed(MouseEvent e){
		int x=((int)(e.getX()/20))-2;
	  	int y=((int)(e.getY()/20))-1;
		if(x>=0&&x<=19&&y>=0&&y<=19&&ruudud[x][y]!=1&&ruudud[x][y]!=2){
		if(asi==0)ruudud[x][y]=1;
		else ruudud[x][y]=2;
		}
		asi++;
		if (asi>1)asi=0;
		paint(getGraphics());
	}
	
	public void mouseReleased(MouseEvent e){}
   public void mouseClicked(MouseEvent e){}
   public void mouseEntered(MouseEvent e){}
   public void mouseExited(MouseEvent e){}
   
   public static void main(String Argumendid[]){     
	   Frame f=new Frame("RENDZU THE BRAIN-WACKER");
	   f.setSize(480,460);
	   f.setResizable(false);
	   f.add(new rendzu());
	   f.setVisible(true);
	   f.addWindowListener(new akenkinni());
	}   
}

class akenkinni extends WindowAdapter{
	public void windowClosing(WindowEvent e){
		System.exit(0);
	}
}