x = 25, y = 25, rule = B36/S23
10boo$9bobbo$10bobo$8boobo$8b3o$8boo3$3b3o$bob3o5b3o$obobo5bobbo$obbo
5bo3bo$boo6bobbo9boo$9b3o9bobbo$20bobobo$19b3obo$19b3o3$15boo$14b3o$
13boboo$12bobo$12bobbo$13boo!
A small period 24 replicator based oscillator.
This uses moulds to confine the replicator.
Dean Hickerson, 1994