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6bobob$5bo4b$2o2bo4bo$2obo2bob2o$4b2o! #C [[ THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ GPS 4 THUMBSIZE 2 ]]
Pattern type Oscillator
Number of cells 15
Bounding box 10×5
Frequency class 27.2
Period 8
Mod 4
Heat 9
Volatility 0.89
Strict volatility 0.89
Discovered by Robert Wainwright
Year of discovery Unknown

Blocker is a period 8 oscillator found by Robert Wainwright. It is a useful dot sparker consisting of two blocks hassling an unnamed object. It reappears half way through its cycle rotated through 180 degrees.


Blocker is about the sixteenth most common naturally-occurring oscillator in Achim Flammenkamp's census, being less common than mazing but more common than jam.[1]

See also


  1. Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on January 15, 2009.

External links