Released with John Carpenter's Halloween in 1978, the main theme was composed and performed by Carpenter as part of the film's minimalist electronic score. Its recurring piano motif became inseparable from Michael Myers and the franchise's identity, returning in later Halloween films and related media. Online, creators use short excerpts to signal that a scene is turning ominous, especially during October, horror retrospectives, costume reveals, and parody edits. The melody remains effective because listeners recognize its threat within only a few notes.