Vibrant colorful lights throbbing across the sky in the middle of the night.My boyfriend and I were standing in our kitchen at 3:20 AM last night (early this morning). His back was to the window as I was facing him and the window. The window looks to the northwest towards the Rose Quarter/Moda Center. As I was talking to him, a flash from outside caught my eye. It was bright red and took up a very large portion of the lower sky. It was throbbing like a strobe light and changing colors with each throb. I shouted, "Look at the sky!!" We both ran over to the window and for the next maybe four seconds, watched as the colors changed. Then it was just gone. My first thought was it was some kind of event going on as it's not abnormal to see spotlights in the sky for things like that. Then I remembered that it was 3:20 AM and the entire city was pretty much shut down. I've been monitoring news sights, asking facebook, etc and have found no answers whatsoever. Northern Lights is the closest looking thing I can describe it as lookin! g like but that's not what it was. Did anybody else see this or have you seen anything similar? I can't stop thinking about it and would love to hear any opinions on what you think it was??