I'd be very interested to know what prime number (my guess is 157) and what primitive root you chose (no clue at all) to create the primitive root sequence.
I have been trying for hours... but I don't seem to be able to find the adequate combination.
On the other hand I have been studying quadratic residue bidimensional sequences that seem to have a very estethic periodicity (like circles) that might look very nice in big patterns (179x179).
I don't know. I might try to build one myself, but it looks like it might take ages...
Thanks in advance for your reply.