“When we were kids Jim used to stay over a lot when Dr. L was on night shifts and, I can’t remember what started it, he had this thing about monsters would try to move in and replace him - I know right? - so they set up a system. She would leave the curtains open so he could see across the lot and the lights outside would scare them away. Over time it kinda turned into a little reminder that she was thinking about him while he wasn’t here. He might not even see it right now with whatever happened and all but it’ll do him good if he did, y’know?”

Nother rough sketch scene from Ghost!AU! Technically this already occurred since Chapter 1 follows Jim though he thought it was Barbara who left it open but as Chapter 2 (Currently being written and I'll be at this scene soon) will confirm, it was actually the only other person who knew about their routine. Given the timing this could have happened in canon during A House Divided since it’s in that wiggle time before the timeline properly begins to split which is kinda neat.
I refuse to draw whatever that blueprint thing on Jim’s wall is. I did do a background though which is scary in it’s self.