private void initializeRocks() {
		for(int i = 0; i < 250; i++) {
			Point point = getRandomLocationOnGrid(525);
			if(getElements().contains(new Rectangle(point.x,
					point.y, GameModel.getUnit(), GameModel.getUnit()))) {
				i++;
				continue;
			} else {
				addRock(point);
			}
		}
		int UNIT4 = GameModel.getUnit() * 4;	// Should be 100 if UNIT is 25
		addRock(new Point(UNIT4 * 3, UNIT4 * 2));	// Below the Shop
		addRock(new Point(UNIT4 * 3 + GameModel.getUnit(), UNIT4 * 2));
		addRock(new Point(UNIT4 * 3 + GameModel.getUnit() * 2, UNIT4 * 2));
	}