Don't watch it wiggle, just seek random points and look at it. The point is that moving the scrunches around changes the feel without changing structural properties.
The idea is that some more-intelligent process would decide how to strategically annotate the cells and this code would warp it in a connectivity-preserving way. Instead of just light and dark cells, imagine the various things you would find in an RTS (spawn locations, resource tiles, ramps, decorated corners).
This experiment was inspired by a talk with Eskil Steenberg and his game Love.