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x = 7, y = 6, rule = B3/S23 4bo$2bobobo$o5bo$o5bo$obobo$2bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ LOOP 2 GPS 2 THUMBSIZE 2 ]]
Pattern type Oscillator
Number of cells 12
Bounding box 7×6
Frequency class 39.5
Period 2
Mod 2
Heat 20
Volatility 0.91
Strict volatility 0.91
Discovered by Unknown
Year of discovery Unknown
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Lei[1] (or 12P2) is a very small period-2 oscillator. It first appeared naturally on March 24, 2015, in a soup submitted to Catagolue by Michael Simkin.[2]

See also


  1. Jeremy Tan (May 8, 2019). Re: Thread For Your Naming Proposals of Unnamed Patterns (discussion thread) at the ConwayLife.com forums
  2. Lewis Patterson (March 24, 2015). Re: Soup search results (discussion thread) at the ConwayLife.com forums

External links

  • 12P2.5 at Heinrich Koenig's Game of Life Object Catalogs