String of 50 or more lights ,Originally going straight then changed to a circle motion covered by a strange cloud that look like smoke

My friend/neighbor and I were walking near a nature trail. We looked up and witnessed a series of 50 or more lights, which seemed spaced out about 10-50 ft from our perspective. Originally the lights were going in a straight line. And I thought oh its probably starling. But the more we watched the lights changed formation in a circular pattern and this strange smoke like looking cloud was moving with it. Almost like it was masking something. I have never seen anything like that in my life. Also worth mentioning that it was heading in the direction of onions belt and then disappeared from plain sight. My friend and neighbor had her phone out and had a star finder app on , it worked on anything but identifying that. There was absolutely no sound or emissions, all the lights were white in color. Interesting enough not one light or craft broke formation.