#N Cross #O Robert Wainwright #C A period 3 oscillator found in October 1989. #C www.conwaylife.com/wiki/index.php?title=Cross x = 8, y = 8, rule = B3/S23 2b4o2b$2bo2bo2b$3o2b3o$o6bo$o6bo$3o2b3o$2bo2bo2b$2b4o!