public ArrayList<Spot> getEmptySpots() {
		ArrayList<Spot> eSpots = new ArrayList<Spot>();
		for (int i = 0; i < SIZE; i++) {
			for (int j = 0; j < SIZE; j++) {
				if (grid[i][j] == 0) {
					Spot sp = new Spot(i,j);
					eSpots.add(sp);
				}
			}
		}
		return eSpots;
	}