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2b4o2b$2bo2bo2b$3o2b3o$o6bo$o6bo$3o2b3o$2bo2bo2b$2b4o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ THUMBSIZE 2 GPS 2 ]]
Pattern type Oscillator
Number of cells 28
Bounding box 10×10
Period 3
Mod 3
Heat 26.7
Volatility 0.83
Strict volatility 0.83
Discovered by Robert Wainwright
Year of discovery 1989

Cross is a period 3 oscillator that was found in October 1989 by Robert Wainwright.[1] It is the smallest in an infinite family of period 3 oscillators, the next of which is cross 2. The fact that this infinite family of oscillators exists shows that there are an infinite number of oscillators that are polyominoes in at least one of their phases. In August 2004 Jason Summers found a 16-glider synthesis of this oscillator.[2]

See also


  1. Dean Hickerson's oscillator stamp collection.
  2. Jason Summers' jslife pattern collection.

External links