public SpaceGreen() {
    super(WIDTH, HEIGHT, CELL);
    Brain2.checkCount();
    Background();
    fillStars(sTars, MAX_STAR);
    Setstars();

    GreenfootImage earthp = new GreenfootImage("Images/HalfEarth.png");
    getBackground().drawImage(earthp, earth.getX(), earth.getY());

    GreenfootImage moonp = new GreenfootImage("Images/Moon.png");
    getBackground().drawImage(moonp, moon.getX(), moon.getY());

    GreenfootImage saturnp = new GreenfootImage("Images/Saturn.png");
    getBackground().drawImage(saturnp, saturn.getX(), saturn.getY());

    GreenfootImage marsp = new GreenfootImage("Images/RedPlanet.png");
    getBackground().drawImage(marsp, mars.getX(), mars.getY());

    ship = new Spaceship();
    mothership = new Mothership();
    explosion = new Explosion();
    addObject(mothership, mothership.getX(mothership.x), mothership.getY(mothership.y));
    addObject(ship, ship.getX(), ship.getY(ship.y));

    Checkstars();

    Checkplanets();
  }
 public void Checkstars() {
   if (isTopLeft(moon.getX(), moon.getY())
       || isTopLeft(mars.getX(), mars.getY())
       || isTopLeft(saturn.getX(), saturn.getY())) {
     topleft = true;
   }
   if (isTopRight(moon.getX(), moon.getY())
       || isTopRight(saturn.getX(), saturn.getY())
       || isTopRight(mars.getX(), mars.getY())) {
     topright = true;
   }
   if (isBottomLeft(moon.getX(), moon.getY())
       || isBottomLeft(saturn.getX(), saturn.getY())
       || isBottomLeft(mars.getX(), mars.getY())) {
     bottomleft = true;
   }
   if (isBottomRight(moon.getX(), moon.getY())
       || isBottomRight(saturn.getX(), saturn.getY())
       || isBottomRight(mars.getX(), mars.getY())) {
     bottomright = true;
   }
 }