Who is the clown that tell the children to kill their parents?

The clown you are referring to is likely "Pennywise," a fictional character from Stephen King's novel "It." Pennywise is a shape-shifting entity that often appears as a clown to lure children. In the story, he preys on their fears and manipulates them, leading to harmful actions. However, it's important to note that this character is a work of fiction and not a real figure.