Scrubber

Scrubber
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Pattern type	Muttering moat Oscillator
Number of cells	28
Bounding box	11 × 11
Period	2
Mod	2
Heat	4
Volatility	0.13
Strict volatility	0.13
Discovered by	Unknown
Year of discovery	1971
Rules Outer-totalistic rules B3/S23 – B3578/S01234678 # of rules 29 = 512
Glider synthesis Fewest gliders 10 Uploaded synthesis RLE scrubber_synth.rle
Pattern files Plaintext scrubber.cells RLE scrubber.rle

Scrubber is a period 2 oscillator that was found in 1971. It is a billiard table configuration with a 4-cell on-off rotor. If its nucleus, a ring of four triminoes, is not constrained it will expand after two generations into a traffic light. Two covers are the smallest option for induction coils.

Placing two nuclei side by side is a form of constraint. Separated by the width of a single cell they can be packed rather arbitrarily into a square lattice, for which an overall constraint is still necessary. The interiors of nuclei separated by the width of two cells are still protected, but the nuclei act like spark coils. Glasses constitutes a binary instance of the arrangement, which can be elaborated as much as desired within a square lattice. The overall figure has period 2, but the relation between the interior and exterior phase must be respected. Boundary constraint is still required. Incommensurability of the widths would preclude mixing single and double spacing except along a linear chain which could even be bounded by spark coils.

See also

• Glasses

External links

• Scrubber at the Life Lexicon

• Scrubber at Adam P. Goucher's Catagolue