private int[] defaultRgbArray(int width, int height) {
		int[] rgbs = new int[width * height];
		// fill everything with UnpassableSandTiles
		Arrays.fill(rgbs, 0xffA8A800);
		
		// add SandTiles for player bases
		for (int y = 0 + 4; y < height - 4; y++) {
			for (int x = (width / 2) - 5; x < (width / 2) + 4; x++) {
				rgbs[x + y * width] = 0xff888800;
			}
		}
		for (int y = 0 + 5; y < height - 5; y++) {
			for (int x = (width / 2) - 3; x < (width / 2) + 2; x++) {
				rgbs[x + y * width] = 0xffA8A800;
			}
		}
		return rgbs;
	}