My somewhat finalized draft

 As the title has indicated I have a much better idea of what I wish to create. I want the focus to be mostly on the killer, because the character will die at the end of the 2 minutes. I want the killer to appear as a stalker as well as a professional serial killer. What I mean by this is that I want the movement of the killer to seem fluid like and seem as if this is not the first time they have done this. The killer will not wear a mask but will instead be in the shadows at all times. This will be difficult to light up correctly, but I want this to make it seem like the killer could be anyone. This will hopefully create a mystery horror, where the plot will derive around who the killer is and trying to find what they do before they kill more people.