public class Airplane extends AnimBase
{
    GreenfootSound  Bullet = new GreenfootSound ("Bullet.wav");//plays the music that i saved in the sound file
    GreenfootSound  Grenade = new GreenfootSound ("Grenade.wav");//plays the music that i saved in the sound file
    GreenfootSound  GameOver = new GreenfootSound ("GameOver.wav");//plays the music that i saved in the sound file
    GreenfootSound backgroundMusic = new GreenfootSound("Background.wav");//plays the music that i saved in the sound file

    int bulletStep=0;
    protected int Score = 0;
    protected int Point = 0;

    
    /**
     * Act - do whatever the Airplane wants to do. This method is called whenever
     * the 'Act' or 'Run' button gets pressed in the environment.
     */
         public void stopped ()
     {
         Point = 0;
         Score = 0;
        }
    public void act() 
    {

       Point = 0;
         Score = 0;
        move (2);//keeps going forward by 2
        Actor Ok = getOneIntersectingObject(Ok.class);
                               if(Ok!= null && Greenfoot.isKeyDown("Left"))//control structure
        // if it is touching the class named Ok and the left key is being pressed                   
        {
           move (+10);//moves 10 so it can not go behind Ok class.
        }
        


   bombDetect();
      {
      catchKey();
    }
    stopped();
}
public void moveLeft()
{
    setLocation(getX()-5, getY());
}
    
    private void catchKey()
    {
        catchKeyMove();
        catchKeyShoot();
    }
    
     private void catchKeyMove()
    {
            if (Greenfoot.isKeyDown("left"))//control structure
      {
          moveLeft ();//abstraction
        }
        if (Greenfoot.isKeyDown("right"))//control structure
        {
            setLocation(getX()+5, getY());
  
        }
        if (Greenfoot.isKeyDown("Up"))//control structure
        {
            setLocation(getX(), getY()-3);
        }
        if (Greenfoot.isKeyDown("Down"))//control structure
        {
            setLocation(getX(), getY()+3);
        }
    }
    
    private void catchKeyShoot()
    {
         
        if(Greenfoot.isKeyDown("space"))//control structure
        {
            Bullet.play ();
           bulletStep = 0;
            bulletStep++;
            
            if(bulletStep==10)//control structure
            {
                Bullets b = new Bullets();
                int posX = getX()+Math.floorDiv(getImage().getWidth(),2)+Math.floorDiv(b.getImage().getWidth(),2);
                getWorld().addObject(b, posX, getY());
                bulletStep=0;
            }
        }
    }
    public void bombDetect()
    {
        GameOver gameover = new GameOver();
        if (isTouching ( Bomb.class))//control structure
        {
            
         Grenade.play ();
          Greenfoot.setWorld(gameover);  
          backgroundMusic.stop ();
          GameOver.play ();
}
}
}

// field
public static final GreenfootImage TILE = new GreenfootImage("space1.jpg");

// in constructor
setBackground(TILE);

// in paint method
GreenfootImage tile = new GreenfootImage(TILE.getWidth(), TILE.getHeight());
tile.drawImage(TILE, position, 0);
tile.drawImage(TILE, position+TILE.getWidth(), 0);
setBackground(tile);

if (scrollPosition > -4200) scrollPosition -= scrollSpeed;

paint(scrollPosition%TILE.getWidth());

Background.backgroundMusic.stop();

public class Robot extends AnimBase
{
    /**
     * Act - do whatever the Robot wants to do. This method is called whenever
     * the 'Act' or 'Run' button gets pressed in the environment.
     */
    
    protected int Score = 0;
    public void act() 
    {
        animCounter = 0;
        
        move (20);
        
        turn(Greenfoot.getRandomNumber(20));

            {
        animCounter++;
        animMove();
        detectCollision();
    }   
} 
    private void animMove()
    {
        if(animCounter<10)
        {
            setLocation(getX(), getY()-2);
            turn(Greenfoot.getRandomNumber(10));
            Greenfoot.delay(5);
        }
        else if(animCounter<30)
        {
            setLocation(getX(), getY()+2);
            turn(Greenfoot.getRandomNumber(10));
            Greenfoot.delay(5);
        }
        else if(animCounter<40)
        {
            setLocation(getX(), getY()-2);
            turn(Greenfoot.getRandomNumber(10));
            Greenfoot.delay(5);
        }
        else
        {
            animCounter=-1;
        }
    }
    
    private void detectCollision()
    {
        if(isTouching(Bullets.class))
        {
            removeTouching(Bullets.class);
            updatePoint();
            checkLast();
            getWorld().removeObject(this);
        }
    }
    
    private void updatePoint()
    {
        
        point++;
        getWorld().showText("Score : "+point,60, 10);
    }
    YouWin youwin = new YouWin();
    private void checkLast()
    {
        if(point==30)
        {
            getWorld().showText("Finish Score "+point,getWorld().getWidth()/2, getWorld().getHeight()/2);
            removeBullet();
            removeHero();
            Greenfoot.stop();
            Greenfoot.setWorld (youwin);

        }
    }
    
    public void removeBullet()
    {
        if(getWorld().getObjects(Bullets.class)!=null)
            for(Bullets b : getWorld().getObjects(Bullets.class))
            {
                getWorld().removeObject(b);
            }
    }
    
    public void removeHero()
    {
        if(getWorld().getObjects(Airplane.class)!=null)
            getWorld().removeObject(getWorld().getObjects(Airplane.class).get(0));
    }
}


       

public void removeBullet()
{
    getWorld().removeObjects(getWorld().getObjects(Bullets.class));
}

public void removeHero()
{
    getWorld().removeObjects(getWorld().getObjects(Airplane.class));
}

Greenfoot.setWorld (new YouWin());