Beacon and two tails (or beacon with cover) is a period 2 oscillator. It consists of a beacon stabilizing a cover.
Beacon and two tails is about the fifty-fifth most common naturally-occurring oscillator in Achim Flammenkamp's census.
- ↑ Mark D. Niemiec. "p2 The 20 fourteen-bit period-2 oscillators". Retrieved on April 28, 2009.
- ↑ Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on January 15, 2009.
- 14P2.17 at Heinrich Koenig's Game of Life Object Catalogs