My pitch for horror movie

I haven't really been able to come up with a good idea for a horror movie yet. I don't think my mind is evil enough. But I've thought of a few things that would be good in a horror.

• I like the way the main protagonist will make friends with someone but then find out later that this person has never existed or have in fact been dead for a longtime as I feel it really shocks the audience and makes them feel unsettled.
• I like movies with zombies in that literally chase the victims down and don't stop attacking until they are completely unable to attack as I think this is really scary.
• I think that forests and abandoned places are good for the setting, and running scenes with flashlights I think are very effective.