x = 540, y = 142
49bo3b3o5b3o3bo404bo3b3o5b3o3bo$46boob5oboo3boob5oboo398boob5oboo3boob
5oboo$44boboobo5bobobobo5boboobo394boboobo5bobobobo5boboobo$43bo3bobo
3b5ob5o3bobo3bo392bo3bobo3b5ob5o3bobo3bo$47b3o5boo3boo5b3o400b3o5boo3b
oo5b3o$44bobbob3o13b3obobbo391bobbobbob3o13b3obobbo$46bo23bo393boo3bo
23bo$463bobo26$45bo5boo5boo5bo408bo5boo5boo5bo$43bobbooboobbo3bobboob
oobbo404bobbooboobbo3bobbooboobbo$41b3o4bobo3bobo3bobo4b3o400b3o4bobo
3bobo3bobo4b3o$41boobbobb3oboo3boob3obbobboo400boobbobb3oboo3boob3obbo
bboo$41b3obb3o4bo3bo4b3obb3o400b3obb3o4bo3bo4b3obb3o$42bobobbo15bobbob
o402bobobbo15bobbobo$43bo23bo404bo23bo3$432boo$431bobo$433bo3$42bo5boo
5boo5bo414bo5boo5boo5bo$40bobbooboobbo3bobbooboobbo410bobbooboobbo3bo
bbooboobbo$38b3o4bobo3bobo3bobo4b3o406b3o4bobo3bobo3bobo4b3o$38boobbo
bb3oboo3boob3obbobboo406boobbobb3oboo3boob3obbobboo$38b3obb3o4bo3bo4b
3obb3o406b3obb3o4bo3bo4b3obb3o$39bobobbo15bobbobo408bobobbo15bobbobo$
40bo23bo410bo23bo10$100bo5boo5boo5bo298bo5boo5boo5bo$98bobbooboobbo3bo
bbooboobbo294bobbooboobbo3bobbooboobbo$96b3o4bobo3bobo3bobo4b3o290b3o
4bobo3bobo3bobo4b3o$96boobbobb3oboo3boob3obbobboo290boobbobb3oboo3boob
3obbobboo$96b3obb3o4bo3bo4b3obb3o290b3obb3o4bo3bo4b3obb3o$97bobobbo15b
obbobo292bobobbo15bobbobo$98bo23bo294bo23bo15$115bo7bo292bo7bo$11boo5b
oo5boo5boo75booboboboo3booboboboo280booboboboo3booboboboo75boo5boo5boo
5boo$9bo3bo3bobbo3bobbo3bo3bo70b3obob3o9b3obob3o274b3obob3o9b3obob3o
70bo3bo3bobbo3bobbo3bo3bo$9bo3bobob3o5b3obobo3bo70bo3bobo5bobo5bobo3bo
274bo3bobo5bobo5bobo3bo70bo3bobob3o5b3obobo3bo$9bo5boobb3ob3obboo5bo
74boo6bobo6boo282boo6bobo6boo74bo5boobb3ob3obboo5bo$9boob3o15b3oboo71b
oo9bobo9boo276boo9bobo9boo71boob3o15b3oboo$9bo25bo71booboo15booboo276b
ooboo15booboo71bo25bo$10bo3bo15bo3bo76bo15bo284bo15bo76bo3bo15bo3bo$
11bobbo15bobbo472bobbo15bobbo8$54bo5boo5boo5bo390bo5boo5boo5bo$4boo5b
oo5boo5boo25bobbooboobbo3bobbooboobbo386bobbooboobbo3bobbooboobbo25boo
5boo5boo5boo$bbo3bo3bobbo3bobbo3bo3bo21b3o4bobo3bobo3bobo4b3o382b3o4bo
bo3bobo3bobo4b3o21bo3bo3bobbo3bobbo3bo3bo$bbo3bobob3o5b3obobo3bo21boo
bbobb3oboo3boob3obbobboo382boobbobb3oboo3boob3obbobboo21bo3bobob3o5b3o
bobo3bo$bbo5boobb3ob3obboo5bo21b3obb3o4bo3bo4b3obb3o382b3obb3o4bo3bo4b
3obb3o21bo5boobb3ob3obboo5bo$bboob3o15b3oboo22bobobbo15bobbobo384bobo
bbo15bobbobo22boob3o15b3oboo$bbo25bo23bo23bo386bo23bo23bo25bo$3bo3bo
15bo3bo484bo3bo15bo3bo$4bobbo15bobbo486bobbo15bobbo5$114boo5boo294boo
5boo$106b4obobobo5bobobob4o278b4obobobo5bobobob4o$105b3oboboboobo3bob
oobobob3o276b3oboboboobo3boboobobob3o$105bo3bobo13bobo3bo276bo3bobo13b
obo3bo$106bob3o5booboo5b3obo278bob3o5booboo5b3obo$106boo21boo278boo21b
oo$106b5o15b5o278b5o15b5o$109boo15boo284boo15boo3$9boo5boo504boo5boo$b
4obobobo5bobobob4o488b4obobobo5bobobob4o$3oboboboobo3boboobobob3o17bo
5boo5boo5bo410bo5boo5boo5bo17b3oboboboobo3boboobobob3o$o3bobo13bobo3bo
15bobbooboobbo3bobbooboobbo406bobbooboobbo3bobbooboobbo15bo3bobo13bobo
3bo$bob3o5booboo5b3obo14b3o4bobo3bobo3bobo4b3o402b3o4bobo3bobo3bobo4b
3o14bob3o5booboo5b3obo$boo21boo14boobbobb3oboo3boob3obbobboo402boobbo
bb3oboo3boob3obbobboo14boo21boo$b5o15b5o14b3obb3o4bo3bo4b3obb3o402b3o
bb3o4bo3bo4b3obb3o14b5o15b5o$4boo15boo18bobobbo15bobbobo404bobobbo15bo
bbobo18boo15boo$42bo23bo406bo23bo3$65boo5boo392boo5boo$57b4obobobo5bob
obob4o376b4obobobo5bobobob4o$56b3oboboboobo3boboobobob3o374b3oboboboob
o3boboobobob3o$56bo3bobo13bobo3bo374bo3bobo13bobo3bo$57bob3o5booboo5b
3obo376bob3o5booboo5b3obo$57boo21boo376boo21boo$57b5o15b5o376b5o15b5o$
60boo15boo382boo15boo!
A period 3960 c/5 spaceship.
This uses many copies of the "spider" period 5 spaceship to perturb a
pair of gliders so as to create another pair of gliders, and so on.
The first glider of the pair is converted into a block.  The second
glider hits the block, and the resulting reaction is perturbed into a
Herschel.  The Herschel is perturbed to create another pair of gliders
to repeat the reaction.  Other spiders delete blocks, blinkers, and
gliders that are also produced.
David I. Bell, September 1997
