A 2D world, trapped in a single dimension of height and width without any type of depth source. This was the world, geometric forms of living beings existed in such reality. A two-dimensional world where there was a curious yellow triangle, which claimed to see stars but no one else could understand what he was referring to, since for them, that triangle didn't have any eyes. That curious triangle was your friend William Lucipher, although you called him Bill Cipher since it sounded better