I drew a Sierpinsky gasket, which to me gives a very pleasing repeating pattern, stuck a Penrose Triangle in the middle, and coloured it all using a size 4 Gold Line acrylic brush and blue, purple and yellow ink. The Penrose Triangle and the constituents of the Sierpinsky gasket were first sketched and pencil and then traced with a Faber-Castell pitt pen.
If you want to participate in OCD's Inktober competition on Steem, you can read more here!
Thank you for reading and get drawing!