Given an initial random assortment of integers from 0 to 99 which fill a 4 by 4 matrix, rearrange them to alter the spatial autocorrelation so as to maximize it, minimize it, or even to drive it to zero. SA is measured in this game by an adjusted Geary's contiguity ratio and Moran's I, varying between -1 and 1.
Give it a try. Here's your random matrix (its SA should be close to 0, since it was filled randomly!):
Do you want to cheat and look at some extreme examples?