kolibrios/programs/demos/life2/lif/BTRACK.lif

#Life 1.05
#D All 8 of David Buckingham's Herschel conduits demonstrated.
#D
#D A Herschel is the 20th generation of the B-heptomino (see BHEPTO).
#D Various combinations of still life can be made to assist the
#D forward propagation of a Herschel, and with Buckingham's complete
#D set, a glider gun of any period greater than 61 can be constructed.
#D This period-1246 loop demonstrates all of them. Each conduit in
#D this pattern is boxed off and labeled, and future Herschel
#D positions are marked by ghost Herschels. See also SLR, GUNB256.
#D 
#D Gens Type      Tightest Compression; Notes
#D ---- ----      ---------------------------
#D 64   90 degree 153 (also 73, 74, 77); 1 glider, aimed inward.
#D 77   move+flip  61; 1 glider (natural b-heptomino glider).
#D 112  90 degree  61; 1 glider, aimed outward.
#D 117  move       63; 1 glider. Can be perturbed by single-spark oscs.
#D 119  move+flip 231; 3 gliders.
#D 156  90 degree  62; 2 gliders: Normal B-hepto glider + one more.
#D 158  move+flip 176 (also 101, 102, 109, 111, 159); 1 glider.
#D 190  90 degree 107; 1 glider, aimed inward.
#N
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