Write about something that scares you. It could be tarantulas or your significant other cheating on you or an existential fear of the unknown so long as it unsettles you. Describe it in the most vivid language possible!
I like the dark, really I do
It's not the dark I'm afraid of...
You creepies, you crawlies,
You murderers, you snitch-ers
You "I hid bodies in the park"-ies
You demonic, devilish sirens-or-such
Lurking around, seeing by touch
No I am not afraid of the twilight
It's the little night critters who give me a fright
Creeping and crawling, oozing and goozing
Sneaking about while I'm quietly snoozing
I am not afraid; I won't scream or shout
but the little night critters better watch out!