#N Heavyweight emulator
#O Robert Wainwright
#C A period 4 oscillator that produces sparks similar to that of the heavyweight spaceship.
#C www.conwaylife.com/wiki/index.php?title=Heavyweight_emulator
x = 16, y = 7, rule = B3/S23
7b2o7b$2b2obo4bob2o2b$2bo10bo2b$3b2o6b2o3b$3o2b6o2b3o$o2bo8bo2bo$b2o
10b2o!