#N Quad
#O Robert Kraus
#C A period 2 oscillator that was found in April 1971.
#C www.conwaylife.com/wiki/index.php?title=Quad
x = 6, y = 6, rule = 23/3
2o2b2o$o2bobo$bo4b$4bob$obo2bo$2o2b2o!