Great on-off

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Great on-off
2b2o4b$bo2bo3b$bobo4b$2obo2bob$4b2obo$7bo$4b3ob$4bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ LOOP 2 GPS 2 THUMBSIZE 2 ]]
Pattern type Oscillator
Oscillator type Babbling brook
Number of cells 18
Bounding box 8×8
Frequency class 22.4
Period 2
Mod 2
Heat 2
Volatility 0.10
Strict volatility 0.10
Rotor type Diagonal on-off
Discovered by Unknown
Year of discovery Unknown

The great on-off (or pincers[1]) is a period-2 oscillator. It has the same rotor as the beacon and resembles two touching loops.


The great-on-off is the ninth most common naturally-occurring oscillator in Achim Flammenkamp's census, being less common than the quadpole but more common than the figure eight.[2]


  1. "Pincers". The Life Lexicon. Stephen Silver. Retrieved on May 1, 2009.
  2. Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on January 15, 2009.

External links

  • 18P2.475 at Heinrich Koenig's Game of Life Object Catalogs