John Conway's Game of Life

Various oscillators of periods 7 to 9

Found by: Hickerson's Apple IIe search program,
Arthur Taber, David Buckingham, John Conway,
Don Woods, Bill Gosper, George Collins Jr.,
Dean Hickerson, Jan Kok, Mark Niemiec,
Sol Goodman, Bob Wainwright, Achim Flammenkamp,
Tim Coe, others.