Updated Fire Alarm Photo

So I was unable to leave this photo alone today (big shock). The fact that it didn't feel quite right was driving me crazy. Now I have but one issue. That damn red square. Being the only unfilled space, I feel it needs something. However whatever I put in there seems to be pushing it too far. So I'm torn as to what to do with it. I like it a lot more since I made the small changes but I'm still going to wonderful about that square.