Toad/Snippet

Toad is a period-2 oscillator that was found by Simon Norton in May 1970. It is the second most common naturally-occurring oscillator, being more common than beacon, although they occur less than a hundredth as often as blinkers. It is also one of very few known oscillators that is a polyomino in one of its phases. Toads often appear in large, complex patterns because of their ability to eat things when paired together (as in killer toads). Additionally, toads are useful as building blocks for constructing large oscillators with periods that are a multiple of two because of the various ways in which they can be hassled.