How to make music scary

Scary music is music that is uncomfortable to listen to. Some things composers do to make music sound scary are:

Using minor scales instead of major scales because minor scales sound more emotive than major scales. The verse part of "Teddy Bear's Picnic" is scary because it is completely made up of the minor scale where as the chorus part uses both making it less effect to create fear.

Atonality and dissonance: Your mind's ear wants to hear a melody. By not using any scale at all, it keeps you from having something comfortable to listen to, this sets up fear in the audience. This is reinforced when the notes don't add up to a single chord, instead they clash with each other and become uncomfortable.

Lack of meter - Bach's "Tocatta in D minor" has a scary feel to it. this is because he does uses alot of uneven spaces between the notes, thus throwing off your mind's ear's desire for rhythmic balance.

Extreme voicing: Using only very low notes gives a dread feeling and similarly, using only very high notes also feels uncomfortable to your mind's ear.

Literalism: An example of this is Bernard Hermann's score for "Psycho", where violins sound like a woman screaming.