 In Conway's Game of Life, the discovery of rakes was one of the key components needed to form the "breeder", the first known pattern in Life in which the number of live cells exhibits quadratic growth.A breeder is formed by arranging several rakes so that the "gliders"—the smallest possible spaceships—they generate interact to form a sequence of "glider guns", patterns which emit gliders.The emitted gliders fill a growing triangle of the plane of the game.