import javax.microedition.lcdui.*;
import java.util.*;

class Louend4 extends Canvas{
  int x, y, samm=0, r=5;
  Timer t;
  protected void paint(Graphics g){
     g.setColor(255, 255, 255);
     g.fillRect(0, 0, getWidth(), getHeight());
     g.setColor(0, 0, 0);
     g.drawRect(x-r, y-r, 2*r, 2*r); 
  }
  protected void keyPressed(int kood){
    if(getGameAction(kood)==Canvas.LEFT){samm=-1;}
    if(getGameAction(kood)==Canvas.RIGHT){samm=1;}
  }
  public void showNotify(){
    x=getWidth()/2;
    y=getHeight()/2;
    t=new Timer();
    TimerTask tt=new TimerTask(){
      public void run(){
        liigu();
      }
    };
    t.schedule(tt, 500, 100); //viivitus, intervall
  }
  
  public void hideNotify(){
    t.cancel();
  }
  
  void liigu(){
     if((samm>0 && x+samm+r>getWidth()) ||
        (samm<0 && x+samm-r<0)){
       samm=0;
     } else {
       x+=samm;
       repaint();
     }
  }
}