Wiki:
Wire [WIRE]
Added in version 55.9, Wire is a solid conductible element based on another game known as WireWorld. WIRE is indestructible (excluding BOMB.) WIRE accepts SPRK from PSCN and gives to NSCN. WIRE works on the same principles as GOL, simple mathematical rules applied cause generation of four different states; Empty, Electron Head (blue), Electron Tail (white), and Conductor (orange). The rules it follows are:
Empty to Empty
Electron head to Electron tail
Electron tail to Conductor
Conductor to electron head if exactly one or two of the neighboring cells are electron heads, or remains Conductor otherwise.
(Please note that one “cell” is one pixel)
WIRE is extremely useful for logic gates, and has many other electronic applications. For example, entire computers (albeit, large ones) have been created made entirely out of WIRE.