does any one have good ideas?

Ok, on my fanfiction.net account *my Nutzername is evilangel478* i'm working on my Halloween story called "fools fprever." i'm having an awesome time Schreiben it, and now here's the summary:
"what life is like for two teenage girls while they live in a Home haunted Von three ghostly, old friends. *AU hope Du enjoy!*"
now i need ideas. i'm not going to use any other horror movie characters (but maybe 1 oder 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 Du all credit too. R&R if you're intrested in mah story! very appreciated Von me! thank u for this! =)