#MCell 4.00
#GAME Rules table
#RULE 1,0,0,0,0,0,0,0,0,0,0,0,0,2,2,2,2,2,2,2,2,2,0,3,3,3,3,3,3,3,3,3,
#RULE 0,3,1,1,3,3,3,3,3,3
#BOARD 60x60
#SPEED 100
#WRAP 0
#CCOLORS 4
#PALETTE 8 colors
#D Clocks
#D 
#D To establish a clock it is only necessary to set up a ring whose
#D circumference has the desired period, draw the signal off at some
#D point, and insert an electron. Diodes can be used to protect the clock,
#D and to ensure a particular direction of circulation. More elaborate
#D clocks can be constructed by spacing out several electrons within
#D the same circumference.
#D 
#D WireWorld inherits the basic three-cell loop from the Zhabotinsky reactions,
#D yielding all kinds of period-3 clocks. That is also the closest spacing that
#D two electrons can have, but it is entirely too fast and dense for most applications.
#D 
#D Loops yielding period six or even longer lead to more conservative constructions.
#D Period six allows the inclusion of ultrafast period three subassemblies. 
#D 
#D A clock seems to be the only way to create the boolean constant TRUE;
#D once again it is worth emphasizing that the constant only appears at intervals
#D and propagates with a finite velocity.
#D 
#D Harold V. MacIntosh
#L 7.A13C$7.B6$7.C$6.B.13C$7.A5$5.3C$4.C3.C$4.C3.13C$4.C3.C$5.CBA5$4.4C$
#L 3.C4.C$3.C4.13C$3.C4.C$4.CCBA5$.7C$C7.C$C7.13C$C7.C$.5CBA