Mold on fumarole

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Mold on fumarole
x = 9, y = 14, rule = B3/S23 3b2o$2bo2bo$bobobo$bo2bo$o$bobo2$4b2o$2bo4bo$2bo4bo$2bo4bo$3bo2bo$bobo 2bobo$b2o4b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]]
Pattern type Oscillator
Number of cells 30
Bounding box 9×14
Period 20
Mod Unknown
Heat 19.9
Volatility 0.70
Strict volatility 0.02
Discovered by Unknown
Year of discovery Unknown

Mold on fumarole is a period 20 oscillator composed of a mold and a fumarole. In terms of its 30 cells, it is the smallest known period 20 oscillator.[1]

Despite being composed of two oscillators of smaller period (4 and 5 respectively), it is considered non-trivial because it has a single cell that is alive in generation 1 and is dead in its other 19 phases.

Image gallery

Generation 1 reveals the single cell with period 20 (in green)


  1. Jason Summers' all-osc pattern collection. Retrieved on April 17, 2009.

External links