My roommate and I were talking and she was facing the window and my back was towards it, we had all of the blinds up. We live in a 3rd floor apartment which has a view of the sunset. It was about 8:30pm. She told me "What is that?" and was looking at something in the sky. I turned around and noticed what she was talking about right away. There was a few clouds and there was this blue circle orb flying around. A certain way it turned you could see that there was red on one side which kind of faded into the blue. But mostly we just saw the blue, cobalt bright blue. It would hover and then go side to side and then it would shoot straight up, come back down through the clouds and do it again. It did this a few times and was around for about 8 minutes. Then it took off really fast to the right past our window view so we ran downstairs outside to see where it went but it was gone. It made no sound. We have no idea what it was. We were wandering if it could be a drone and looked up pics online but it did not look like them. We think it was a UFO.We were very excited and surprised.