!Name: Heavyweight emulator
!Author: Robert Wainwright
!A period 4 oscillator that produces sparks similar to that of the heavyweight spaceship.
!www.conwaylife.com/wiki/index.php?title=Heavyweight_emulator
.......OO
..OO.O....O.OO
..O..........O
...OO......OO
OOO..OOOOOO..OOO
O..O........O..O
.OO..........OO