#N Bi-clock
#C A pure glider generator made up of two clocks.
#C www.conwaylife.com/wiki/index.php?title=Bi-clock
x = 7, y = 7, rule = B3/S23
2bo4b$2o5b$2b2o3b$bo3bob$3b2o2b$5b2o$4bo!