Ineed for english i have to make up a mith and i do not know what to write about. tips plzzz

Do you mean myth? if so, here are some prompts you can work off of

The story of how ice was created, you could start off with a goddess who was warm hearted into something that became cold and distant and she was the goddess of seasons and that's why we have winter now 

you could come up with the story of how we talked. How people used to not have mouths but the gods decided to give us something to be able to communicate better so we could worship them. Splitting the empty space to make mouths. 

You could do a lot of things. Typically myths are either about how something came to be or how a god messed up another god's day by killing the person they loved or just royally flipping them off. 

You can write about a scary movie.
“IT”, or maybe even write about Bloody Mary, Candyman, Jeepers Creepers. Turn it into your own story using them.

Aor c hope it