Here's my first attempt at producing purple science in a city block, no modules or beacons. Produces 4 purple science per second, which is probably insignificant to most, but I'm proud of
Factorio Prints: Tileable Science Production 0.17 - Early to Mid Game *Experimental*
Factorio Prints: Purple Science 0.17.e.20190512
factorio blueprint Tileable Science Production - Early to Mid Game