Help on a horror screenplay idea!!?

Me and a few of my friends have decided to write and film a screenplay for extra credit in our lanugage arts class. we already know that we want 3 main characters (2 boys, 1 girl) and that it takes place in an abandoned barn (which we've found just outside of my neighborhood). Any ideas on the subject are... show more Me and a few of my friends have decided to write and film a screenplay for extra credit in our lanugage arts class. we already know that we want 3 main characters (2 boys, 1 girl) and that it takes place in an abandoned barn (which we've found just outside of my neighborhood). Any ideas on the subject are welcome! Thanks! :)
Update: also, all of the barn's windows are knocked out.
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