Went to Pittsburgh today to see the navy ship. while we was there my girlfriend wanted pictures of her car on top of the parking garage in station square. After taking the pictures and reviewing them. I notice lights in the sky. At first I thought it was a reflection messing with the camera from the sky scraper behind it. After zooming in I notice there is a dark spot in the center of the lights in one of the pictures. I sent the pictures to my phone and the light look like Tetris game. I can upload original pictures or email them if anyone is interested in viewing them. I have no idea what this is or can be. It is possible that the reflection of that building caused it but I can explain the dark spot in the center that I seen.