#N Diamond ring
#O David Buckingham
#C A period 3 oscillator found in 1972.
#C www.conwaylife.com/wiki/index.php?title=Diamond_ring
x = 13, y = 13, rule = b3/s23
6bo6b$5bobo5b$4bobobo4b$4bo3bo4b$2b2o2bo2b2o2b$bo4bo4bob$obob2ob2obobo
$bo4bo4bob$2b2o2bo2b2o2b$4bo3bo4b$4bobobo4b$5bobo5b$6bo!