You can make a kit for a chessboard cake with baking tins and some tin foil.
If your cake tin is 9", then make a 7" foil circle and a 5" foil circle, drop them into the tin before you put the mix in, and you can alternate the different coloured cake mixes between the foil dividers.
To get a good size cake, you need at least three layers, but I've used it a few times and it saves a LOT of faffing about.