Observed moving east to west, in a dark night sky. A band I work with had just finished performing at a downtown outdoor festival. I was standing behind the stage area, talking with a musician, facing toward Lake Michigan, which was about 4 blocks away. I saw 4 reddish-orange spheres, moving slowly in the night sky, as if in unison, from the lake vicinity toward land, coming our direction. I showed the musician and he was captivated, like me, as we watched. They slowly disappeared behind a tall building. We wondered what we had seen, and then he said, “Look, there’s another.” As another appeared on the horizon, soon there were 2 more. That group of 3 spheres, or orbs, same color, moved the same general direction, quietly, again in unison and moved behind the same tall building until we could not see them. Again the sky was dark and we watched as slowly a group of 5 more appeared, moving the same general direction, slowing, as if in unison. Last, 2 more appeared and did the same thing, always moving slowing, east to west, but disappearing. I got a few photos. I’m very aware of the night sky, and my surroundings and have never seen anything like this; neither had the musician who watched as long as I did, a total time of about 15 minutes. I’ve never have seen anything I’d call a UFO, until this. Info. about witnesses: adult female, college grad, school teacher for 35+ years; adult male, musician/keyboard player, highly respected in the community for many years. We are just casual acquaintances.