public void move_down(int multiples) { location.move_multiples(Field2D.TDOWN, multiples); }
public void move_left(int multiples) { location.move_multiples(Field2D.TLEFT, multiples); }
public void move_right(int multiples) { location.move_multiples(Field2D.TRIGHT, multiples); }
public void move_up(int multiples) { location.move_multiples(Field2D.TUP, multiples); }