#C A period 1664 rocket gun using the growth and death of a crystal.
#C Here a period 128 rocket gun shoots rockets through two gates made up
#C of period 64 spark oscillators.  The nearest gate allows rockets to go
#C through with no reaction.  The furthest gate allows one rocket through,
#C but perturbs it's tail to create a crystal seed.  Further rockets
#C collide with that seed to grow a crystal.  The crystal grows back until
#C it reaches the nearest gate.  The nearest gate then perturbs the crystal
#C so that it self-destructs cleanly, and the cycle can begin again.
#C The furthest gate can be moved closer or farther away by multiples of 20
#C cells and have it's phase adjusted) to adjust the size of the crystal made,
#C and thus the period of the gun.  The one here multiplies the base period
#C by 13.
#C David I. Bell, October 1997
x = 410, y = 85, rule = B3678/S34678
4boo$bb4o24boo$bb3o25boo$b5o23b4o$ob3obo21bob3o$ob3obo21bob4o$b5o23b5o
$b5o23b6o$b5o23b6o$b5o23b7o$b5o23b7o$b5o23b8o$ob3obo21bob7o$ob3obo21bo
b8o$ob3obo21bob8o$b5o23b8o$b5o23b8o$b5o23b7o$b5o23b7o$b5o23b9o107boo$b
5o23b9o$ob3obo21bob9o106boo247b5o$ob3obo21bob9o$ob3obo21bob8o107boo
247b5o$ob3obo21bob8o102b4o4boo6bobboobboo216b4obboobboo7b4o$b5o23b11o
99bo4b4obb6oboobboobbo214bo4boobboobb7o4b3o$b5o23b13o95b8obb21o210b16o
5b10o$ob3obo21bob12o95b31o210b31o$ob3obo21bob14o92b9obb22o208b17o5b11o
$b5o23b15o92boobo4b4obb6oboobboobboboo208boobo4boobboobb7o4b3oboo$bb3o
25b16o19b6o69b4o4boo6bobboobboo216b4obboobboo7b4o$bb4o23b6o7b4o17b10o
72boo247b5o$4boo23boobb11o19b3o4b3o$65boobboo74boo247b5o$35b7o$145boo$
111boo$111boboo53bo31bo40bo59bo36bo$47booboo55boob4o53boo9bo19booboo
34boobobo45bo8booboo4bo31bo28booboo$17bo29b6o45bo8b8obo23bo15boo9b4obo
4b4o17bobobo13boo12bo6b6obo15bo15boobo7boo8b8obobo26bobboo4boboobb3o7b
o6b6o$16b3o27b6obo35bo7boboboo3bob10o21b3o12b6oboo3bob3obo3b6o16b5o11b
6oboo4b6o3bob8o28b6o7b3oboo3bob9obbo25b3obo3bobo5bo6b5o3bob4obo$15b5o
27b8o33b4o3b10obb12o20b5o10b11obb16o31b9obobbob6obb10o27b7ob3obb8obb
14o23b5o4boobbo3b4o3b7obb8o$14b7o25bob8o31bob3o4bob22o19b4obo10b29o31b
10o3b20o27b37o23b7obbobobbob25o$15b5o27b8o33b4o3b10obb12o20b5o10b11obb
16o31b9obobbob6obb10o27b7ob3obb8obb14o23b5o4boobbo3b4o3b7obb8o$16b3o
27b6obo35bo7boboboo3bob10o21b3o12b6oboo3bob3obo3b6o16b5o11b6oboo4b6o3b
ob8o28b6o7b3oboo3bob9obbo25b3obo3bobo5bo6b5o3bob4obo$17bo29b6o45bo8b8o
bo23bo15boo9b4obo4b4o17bobobo13boo12bo6b6obo15bo15boobo7boo8b8obobo26b
obboo4boboobb3o7bo6b6o$47booboo55boob4o53boo9bo19booboo34boobobo45bo8b
ooboo4bo31bo28booboo$111boboo53bo31bo40bo59bo36bo$111boo$145boo$35b7o$
65boobboo74boo247b5o$4boo23boobb11o19b3o4b3o$bb4o23b6o7b4o17b10o72boo
247b5o$bb3o25b16o19b6o69b4o4boo6bobboobboo216b4obboobboo7b4o$b5o23b15o
92boobo4b4obb6oboobboobboboo208boobo4boobboobb7o4b3oboo$ob3obo21bob14o
92b9obb22o208b17o5b11o$ob3obo21bob12o95b31o210b31o$b5o23b13o95b8obb21o
210b16o5b10o$b5o23b11o99bo4b4obb6oboobboobbo214bo4boobboobb7o4b3o$ob3o
bo21bob8o102b4o4boo6bobboobboo216b4obboobboo7b4o$ob3obo21bob8o107boo
247b5o$ob3obo21bob9o$ob3obo21bob9o106boo247b5o$b5o23b9o$b5o23b9o107boo
$b5o23b7o$b5o23b7o$b5o23b8o$b5o23b8o$ob3obo21bob8o$ob3obo21bob8o$ob3ob
o21bob7o$b5o23b8o$b5o23b7o$b5o23b7o$b5o23b6o$b5o23b6o$b5o23b5o$ob3obo
21bob4o$ob3obo21bob3o$b5o23b4o$bb3o25boo$bb4o24boo$4boo!
