public void eatPellet(int x, int y) {
		int target = -1;
		for (int i = 0; i < pellets.size(); i ++) {
			if (pellets.get(i).x == x && pellets.get(i).y == y) {
				target = i;
			}
		}
		if (target > -1) {
			pellets.remove(target);
		}
	}