#N Loading dock
#O David Buckingham
#C A period 3 oscillator that was found in September 1972.
#C www.conwaylife.com/wiki/index.php?title=Loading_dock
x = 9, y = 8, rule = B3/S23
4bo4b$2b3o4b$bo3b2o2b$ob2o3bob$bo3b2obo$2b2o3bob$4b3o2b$4bo!