#N 77p77 #C The smallest known period 77 oscillator. #C http://conwaylife.com/wiki/77P77 x = 16, y = 21, rule = B3/S23 8b2o$6bo2bo$4b4o$3bo4b4o$3bobobo4bo$b2o4bob3o2bo$o2b5obo2b3o$bo2bo6bo$ 2b2o8bo$4bo6b2o$2b2o$2bo$4bo$3b2o3bo$8b2o$6bobob3o$4b3obobobo$3bo5bo2b 3o$3b2o5b2o3bo$12b3o$12bo!