#C A period 480 butterfly gun.
#C This gun creates period 3 diagonal spaceships by running rockets from a
#C period 480 rocket gun into a period 20 spark oscillator.  A second period 20
#C spark oscillator is used to perturb the reaction so as to prevent the
#C destruction of the first spark oscillator.
#C David I. Bell, January, 1998
x = 221, y = 47, rule = B3678/S34678
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