monochrome dream

one night i was sleeping at my grandma's house in a guest room, everything was normal until i started to sleep, in my dream i was lying in the same room, only the room was all monochrome, and with two figures looking at me , one that was at the door was all dark and had the shape of a child, the second a creature with a large black body with a small (compared to the body) and white head, she was waving at me, I just remember that, if anyone know what it could mean it would be nice to talk