It's a good illustration of a simple equation, and it shows that you are a good programmer (Much better than I am, as far as I can tell. Any attempt I made wouldn't look so nice.) But, beyond that, there really isn't much to this. Though I will say that making the pattern on the grid change through every iteration of this 'game' was a nice idea. Unfortunately, the arrangement of the grid can't hide the pattern that makes this trick work.
Overall, though, good work!