Thumb

A thumb is a spark-like protrusion that flicks out from an oscillator or other pattern in a manner that resembles a thumb being flicked.

Shown below is a period 4 thumb that was found by David Eppstein in June 2000. Dean Hickerson also found a period 9 thumb sparker in October 1998.

5bo5b$b2o3bo4b$bo5bo3b$2b3obob2ob$7b2obo$6o4bo$o4b5ob$3bo7b$2bob4o3b$ 2bobo2bo3b$3bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 ]]

A period 4 thumb (click above to open LifeViewer) RLE: here Plaintext: here

Also see

• Thumb 1
• Thumb 6
• Thumb 1 on queen bee shuttle

External links

• Thumb at the Life Lexicon