Eater plug

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Eater plug
o$3o$3bo$2bo$2bo2bo$3b2obo$6bo$6b2o! #C [[ THEME 6 GRID GRIDMAJOR 0 THUMBLAUNCH AUTOSTART ]] #C [[ LOOP 2 GPS 2 THUMBSIZE 2 ]]
Pattern type Oscillator
Number of cells 14
Bounding box 8×8
Period 2
Mod 2
Heat 2
Volatility 0.13
Strict volatility 0.13
Rotor type Diagonal on-off
Discovered by Robert Wainwright
Year of discovery 1973

Eater plug (or cavity[1]) is an extensible period 2 oscillator that was found in February 1973 by Robert Wainwright. Its name derives from its resemblance to two diagonally-touching eater 1s.

It has an identical rotor to the great on-off, which is interestingly over 1000 times more common than it despite its size.


Eater plug is about the fifty-fifth most common naturally-occurring oscillator in Achim Flammenkamp's census.[2]


  1. Eric Weisstein. "Cavity". Eric Weisstein's Treasure Trove of Life. Retrieved on April 26, 2009.
  2. Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on January 15, 2009.

External links