#N Block-laying switch engine predecessor
#C A simple 12-cell pattern that evolves into the diagonal period 288 c/12 block-laying switch engine puffer.
#C www.conwaylife.com/wiki/index.php?title=Block-laying_switch_engine
x = 16, y = 4, rule = b3/s23
11bobo2b$2o8bo5b$2o9bo2bob$13b3o!