#N Washing machine
#O Robert Wainwright
#C A period 2 oscillator found no later than June 1972.
#C www.conwaylife.com/wiki/index.php?title=Washing_machine
x = 7, y = 7, rule = B3/S23
b2ob2ob$ob2o2bo$2o4bo$bo3bob$o4b2o$o2b2obo$b2ob2o!