This challenge is to create one of the classic demo scene effects which I refer to as checker board, but it might be called something else (see video for example). The objective on the surface seems simple, but if you just draw layers of BOX you'll run into fill rate bottlenecks the more layers you add.. So perhaps there's another way of create the same effect without just drawing all the layers..
So for those that take this challenge on, you'll learn many fundamentals ranging from 2d drawing primitives / optimization / culling. Which will of course l translate into your everyday BASIC programming skills.