You got some of it! The clown is actually the one from the Poltergeist and the painting is of Camp Crystal Lake from Friday the 13th. What you were missing: the girl in the corner wearing Freddy Kruger's sweater, the book from the Evil Dead on the shelf, and the clock has the time that clock always stopped at in Amityville Horror. If we reallly want to stretch one, you could say the ouija board references the one Regan used in the Exorcist.