#N Tub test tube baby #C A period 2 oscillator. #C www.conwaylife.com/wiki/index.php?title=Tub_test_tube_baby x = 10, y = 6, rule = B3/S23 bo6bob$obo4bobo$bobo2bobob$3bo2bo3b$3bo2bo3b$4b2o!