#C A period 960 rocket gun demonstrating a period doubling reaction.
#C Here rockets run into a p4 oscillator to alternately create and destroy
#C a piece of junk in front of the p4 oscillator.  Rockets coming in from
#C the sideways direction can detect the results of the first reaction,
#C and so only escape every other time.  Nested copies of this reaction
#C can be used to generate arbitrarily high periods.
#C David I. Bell, May 1997
x = 265, y = 227, rule = B3678/S34678
183bo$182bobo$181bobobo$182bobo$183bo23$164boo35boo$164boo35boo$162b5o
33b5o$162b4obo31bob4o$160b6obo31bob6o$160b6obo31bob6o$158b8obo31bob8o$
158b9o33b9o$156b11o33b11o$156b10obo15bo15bob10o$154b12obo12b7o12bob12o
$154b13o13b7o13b13o$153b12obobo12b5o12bobob12o$154b13o14b5o14b13o$153b
13obo11b9o11bob13o$153b13obo10b3ob3ob3o10bob13o$154b13o14bobobo14b13o$
154b13o33b13o$156b10obo31bob10o$156b10obo31bob10o$158b9o33b9o$158b7obo
bo29bobob7o$157b8obobo29bobob8o$157b8obobo13b3o13bobob8o$158b7obobo12b
obobo12bobob7o$158b7obobo11boo3boo11bobob7o$156b9obobo12bo3bo12bobob9o
$156b9obobo11boo3boo11bobob9o$154b11obobo29bobob11o$154b11obobo11b7o
11bobob11o$153b12obobo11b7o11bobob12o$153b12obobo12b5o12bobob12o$154b
11obobo13b3o13bobob11o$153b12obobo13b3o13bobob12o$154b11obobo14bo14bob
ob11o$154b11obobo11bobbobbo11bobob11o$156b9obobo13b3o13bobob9o$156b9ob
obo12b5o12bobob9o$158b7obobo12b5o12bobob7o$158b7obobo11b7o11bobob7o$
160b5obobo12b5o12bobob5o$160b5obobo12b5o12bobob5o$162b5o15b3o15b5o$
162b5o15b3o15b5o$164boo17bo17boo$164boo14bobbobbo14boo$179bob5obo$179b
9o$180b7o$179b9o$179bob5obo$180bob3obo$181bobobo$182b3o10$164boo35boo$
164boo35boo$162b5o33b5o$162b5o33b5o$160b5obobo29bobob5o$160b5obobo29bo
bob5o$158b7obobo29bobob7o$158b7obobo29bobob7o$156b9obobo29bobob9o$156b
9obobo29bobob9o$154b11obobo29bobob11o$154b11obobo29bobob11o$153b12obob
o29bobob12o$154b11obobo29bobob11o$153b12obobo29bobob12o$153b12obobo29b
obob12o$154b11obobo29bobob11o$154b11obobo29bobob11o$156b9obobo29bobob
9o$156b9obobo29bobob9o$158b7obobo29bobob7o$158b7obobo29bobob7o$157b8ob
obo29bobob8o$157b8obobo29bobob8o$158b7obobo29bobob7o$158b9o33b9o$156b
10obo31bob10o$156b10obo31bob10o$154b13o33b13o$154b13o33b13o$153b13obo
31bob13o$153b13obo31bob13o$154b13o33b13o$153b12obobo29bobob12o$154b13o
33b13o$154b12obo31bob12o$156b10obo31bob10o$156b11o33b11o$158b9o33b9o$
158b8obo31bob8o$160b6obo31bob6o$160b6obo31bob6o$162b4obo31bob4o$162b5o
33b5o$164boo35boo$164boo35boo24$38boboo14boobo41boboo14boobo$36b8o10b
8o37b8o10b8o$36b4ob3o10b8o37b8o10b3ob4o$34b12o6b12o33b12o6b12o$34b6ob
5obboobb12o33b12obboobb5ob6o$32b34o29b34o$32b8ob25o29b25ob8o$30b38o25b
38o$30b10ob27o25b27ob10o$28b42o21b42o$28b12ob29o21b29ob12o$26b46o17b
46o$26b14ob6obb23o17b23obb6ob14o$28bo4b4obb3o4b4o10bo4boobbo21bobboo4b
o10b4o4b3obb4o4bo$29b4o4boo3b4o4b10ob4obboo23boobb4ob10o4b4o3boo4b4o$
40bo6boo63boo6bo$$40bo79bo$$40bo79bo$$40bo79bo$$40bo79bo$22boo233boo$
22boo16bo79bo136boo$20bob3obboo184bo3bo34boobb3obo$18boobb6obo8boo12bo
178boo3bo14bob6obboo$17bob10o4boob6o9bo3bo158b3o12b6o6b4oboo4b10obo$bo
14bob11obb11o10b5o172b10obbob7obb11obo$3o13b25o7b9o158bo14b8ob26o$bo
14bob11obb11o10b5o172b10obbob7obb11obo$17bob10o4boob6o9bo3bo158b3o12b
6o6b4oboo4b10obo$18boobb6obo8boo12bo178boo3bo14bob6obboo$20bob3obboo
184bo3bo34boobb3obo$22boo16bo79bo136boo$22boo233boo$40bo79bo$$40bo79bo
$$40bo79bo$$40bo79bo$$40bo6boo63boo6bo$29b4o4boo3b4o4b10ob4obboo23boo
bb4ob10o4b4o3boo4b4o$28bo4b4obb3o4b4o10bo4boobbo21bobboo4bo10b4o4b3obb
4o4bo$26b14ob6obb23o17b23obb6ob14o$26b46o17b46o$28b12ob29o21b29ob12o$
28b42o21b42o$30b10ob27o25b27ob10o$30b38o25b38o$32b8ob25o29b25ob8o$32b
34o29b34o$34b6ob5obboobb12o33b12obboobb5ob6o$34b12o6b12o33b12o6b12o$
36b4ob3o10b8o37b8o10b3ob4o$36b8o10b8o37b8o10b8o$38boboo14boobo41boboo
14boobo3$183bo$182bobo$181bobobo$182bobo$183bo!
