x = 51, y = 53, rule = B3678/S34678
15b29o$45boo$13b32obbo$11b4o29b6o$11b39o$10b5o29b7o$10boob32obboboo$
45boo$15b29o12$18boo$18bo$13boo3bo3bo$bboo9b8oboo$6oboo3bob11o$11obb
13o$b26o$11obb13o$6oboo3bob11o$bboo9b8oboo$13boo3bo3bo$18bo$18boo12$
15b29o$45boo$10boob32obboboo$10b5o29b7o$11b39o$11b4o29b6o$13b32obbo$
45boo$15b29o!
A rocket converted to a period 32 spaceship in-line by period 256 sparks.
Other period sparks can also be used.
David I. Bell, May 1997

