#N 28P7.1
#C An unnamed period 7 oscillator that is tied as the smallest known.
#C www.conwaylife.com/wiki/index.php?title=28P7.1
x = 13, y = 9, rule = B3/S23
2b2o9b$2bo10b$7bo5b$6obo5b$o12b$b2ob2o3b2o2b$2bobo4bobob$2bobo6bob$3bo
7b2o!