ConwayLife.com

I'm obviously new here, so forgive me if I missed something glaringly obvious please, but when I was looking through the wiki I noticed it listed only one type of 2 period oscillator, the blinker. However, what about this one?

It switches between that state and the touching corners disappearing. I don't doubt that someone's already found this, but I was simply more curious as to why is wasn't on the wiki (that I could find) or the Game of Life information site.

Welcome to the forum! That oscillator is called a beacon, and it's pretty well known. You're obviously new to this forum and maybe also Conway's Game of Life, so don't feel bad.

Rotten wrote:..... when I was looking through the wiki I noticed it listed only one type of 2 period oscillator, the blinker..... .

Are you sure you have the right Wiki? From the main page there is a panel including the option "oscillators." Selecting that, there is a huge array of oscillators, but there is a pull down menu allowing the selection of an exact period or range of periods. It is a little tricky to operate and if you press carriage return you have to start over again. Otherwise there are 66 period 2 oscillators to choose from.