Clock 2

Clock 2
6b2o4b$6b2o4b2$4b4o4b$2obo4bo3b$2obo2bobo3b$3bo2bobob2o$3bobo2bob2o$4b 4o4b2$4b2o6b$4b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ LOOP 4 GPS 2 THUMBSIZE 2 ]]
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Pattern type	Oscillator
Oscillator type	Billiard table
Family	Pinwheel
Number of cells	35
Bounding box	12 × 12
Period	4 (mod: 1)
Heat	4
Volatility	0.20 | 0.20
Kinetic symmetry	nrk
Discovered by	Unknown
Year of discovery	Unknown
Rules Outer-totalistic rules B3/S23 – B3678/S0235678 # of rules 28 = 256 Isotropic rules B3ij/S2ik3aenr – B1e2ikn34-intw5-knqr678/S01c234-n5678
Glider synthesis Fewest gliders (canonical) 136† Catagolue-generated RLE (canonical) synthesis Fewest gliders (cheapest variant) 117† Catagolue-generated RLE (cheapest variant) synthesis Uploaded synthesis RLE clock2_synth.rle †Can be constructed with 15 gliders using the reverse caber tosser universal constructor.
Pattern files Plaintext clock2.cells RLE clock2.rle
Identifiers apgcode (canonical) xp4_gg0g88bbgz1107899a7066zy033 apgcode (cheapest variant) xp4_w3iab88gz6607899a7066zy233 Pentadecathlon ID 35P4.11

Clock 2 is a period-4 oscillator. It is a billiard table configuration with the same stator as pinwheel.

On April 22, 2016, Martin Grant provided a glider synthesis for this oscillator. Using the same precursor, the two routes to clock 2 and pinwheel diverge in the middle.

On January 27, 2024, 400spartans showed that an agar containing clock 2 rotors is self-forcing, so has no predecessors which are agars of the same spatial period.

x = 16, y = 16, rule = B3/S23:T16,16 obo2bo2bobo2bo$2b4obo2b4obo$2o4b4o4b2o$bo2bo4bo2bo$bo2bobo2bo2bobo$2obo2b4obo2b2o$2b4o4b4o$o4bo2bo4bo$obo2bo2bobo2bo$2b4obo2b4obo$2o4b4o4b2o$bo2bo4bo2bo$bo2bobo2bo2bobo$2obo2b4obo2b2o$2b4o4b4o$o4bo2bo4bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 WIDTH 640 HEIGHT 640 ZOOM 40 LOOP 4 GPS 2 AUTOSTART ]]

self-forcing clock 2 agar (click above to open LifeViewer)

See also

• Clock
• Sixty-nine

External links

• Clock 2 at the Life Lexicon
• Clock 2 at Adam P. Goucher's Catagolue
• 35P4.11 at Heinrich Koenig's Game of Life Object Catalogs