kolibrios/programs/demos/life2/lif/BREEDER4.lif

#Life 1.05
#D Pufferless breeder (Standing breeder)
#D A shotgun sends an 8 spaceship salvo eastward every 360 gens.
#D Call the spaceships, from top to bottom, A, B, C, D, D', C', B',
#D and A'.  D and D' are MWSSs; the others are HWSSs.  (The shotgun's
#D output is approximately glide symmetric.)  Every 360 gens, two
#D guns and a kickback reaction are used to create a northeastward
#D glider in front of A and B.  A and B redirect the glider
#D southeastward.  Then C' and D' duplicate it, producing 2 SEward
#D gliders and a block.  The second glider escapes, the block is
#D deleted by D, and the first glider is turned NEward by A' and B'.
#D It is duplicated by C and D, again producing an escaping glider, a
#D block that gets deleted by the next D', and another NEward glider.
#D The latter interacts with the next A and B in the same way as the
#D original glider did, 596 gens later and 118 units farther east.
#D 
#D Thus, in gen t, there are approximately  t/360  gliders zigzagging
#D east, each producing 2 more gliders every 596 gens.  So the
#D population is growing by about  5 * 2/596 * t/360  =  t/21456
#D cells per generation, and the total population is about  t^2/42912.
#D The gliders occupy a nonconvex quadrilateral with vertices at
#D (approximately)  (0,0),  (t/4,t/4),  (59t/298,0),  and  (t/4,-t/4).
#D Dean Hickerson, dean@ucdmath.ucdavis.edu  10/12/92
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