It would be interesting to see what would happen if the colors were given by following a space-filling curve in three dimensions, like the last figure at http:/

It would be interesting to see what would happen if the colors were given by following a space-filling curve in three dimensions, like the last figure at http://mathworld.wolfram.com/HilbertCurve.html http://mathworld.wolfram.com/HilbertCurve.html