Banana spark

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Banana spark
x = 11, y = 15, rule = B3/S23 2bo$obo$b2o$4b2o$6bo6$4b2o$6bo$8b2o$8bobo$8bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ZOOM 16 HEIGHT 480 GPS 1 PAUSE 2 T 4 PAUSE 2 LOOP 5 ]]
Pattern type Spark
Number of cells 3
Bounding box 3 × 2
Discovered by Unknown
Year of discovery 1970

A banana spark is a common three-bit polyplet spark used in glider synthesis and signal circuitry. The Buckaroo and Rich's p16 both produce this spark, and the twin bees shuttle produces a variation of this spark. It can be used to turn a glider 90 degrees, as shown in the infobox pattern.

In other rules

In rule B2-a/S12, the banana spark evolves into a period-6 c/6 diagonal spaceship, which completes the proof that the smallest minimum population of a spaceship in an isotropic 2D rule is 3 cells (all two-cell patterns have rotational symmetry of some form and therefore can't be spaceships). Similarly, in a whole bunch of rules containing B2-a/S1, it is a c/4 diagonal spaceship.

In rule B2ae/S, the banana spark evolves into a period-2 photon.

External links