public boolean cansee(int x, int y,Class clss)
    {
        Actor actor = getOneObjectAtOffset(x, y, clss);
        return actor !=null;
    }
    public void Gravity()
    {
       if(! canSee(0,32,Dirt.class)||canSee(0,32,Leaves.class)||canSee(0,32,Grass.class)||canSee(0,32,Cloud.class))
       {
          setLocation(getX(),getY()+10);
       }
    }