#N Pulsar
#C The largest common oscillator: 48 cells with fourfold symmetry, pulsing on a period of 3. Despite its size it turns up naturally in random soups.
#C Exported from Lifeform
x = 13, y = 13, rule = B3/S23
2b3o3b3o2b2$o4bobo4bo$o4bobo4bo$o4bobo4bo$2b3o3b3o2b2$2b3o3b3o2b$o4bobo4bo$o4bobo4bo$o4bobo4bo2$2b3o3b3o2b!