does any one have good ideas?

Ok, on my fanfiction.net account *my username is evilangel478* i'm working on my halloween story called "fools fprever." i'm having an awesome time Pagsulat it, and now here's the summary:
"what life is like for two teenage girls while they live in a tahanan haunted sa pamamagitan ng three ghostly, old friends. *AU hope you enjoy!*"
now i need ideas. i'm not going to use any other horror movie characters (but maybe 1 or 2 at max) but if any body has any, please tell me. i want this story to be 50-55 chapters long. and i'll try tp use as many ideas as i can. i will give you all credit too. R&R if you're intrested in mah story! very appreciated sa pamamagitan ng me! thank u for this! =)