The Legend of IT

Back in 1990, Pennywise was thrown into Earth as a punishment for breaking a law in his world. He don't know what to eat, he don't know where to live, until one time, many people became afraid of him. He have killed many people and ate them, specially children in fear. But that's all we know. We don't know who really is It. We don't know where he came from and what he usually does. We don't know his life, if he really had one back then.