#N Blocked p4-4
#O Matthias Merzenich
#C A sparking period 4 oscillator found by Matthias Merzenich in April 2010.
#C http://conwaylife.com/wiki/Blocked_p4-4
x = 19, y = 9, rule = B3/S23
11bo$4bo3bo4bob2o$3bobo10bo$3bobo8b2o$2obobob7o2b3o$2obo11bo2bo$3bo12b
2o$3bobo$4b2o3b3o!
