x = 15, y = 20, rule = B36/S23 11b3o$10bo3bo$9bo4bo$8bobbobbo$8bo4bo$8bo3bo$9b3o4$14bo$14bo$14bo$$bb 3o$bobbo$o3bo$obbo$3o$9b3o! This is a period 48 sideways rake. It is composed of two bombers whose bombs react to form gliders. David I. Bell, 1994