if (amount != 0) {
	for (int i=0; i<Math.abs(amount); i++) {
		playerPosition+=Integer.signum(amount);
		playerPosition = Math.floorMod(playerPosition, squareList.size());
		if (i != Math.abs(amount) - 1) {
			squareList.get(playerPosition).onPassed();
		}
	}
}