Circular flying objects at Winnipeg lake, between Hecla Island and Black Island

I was sitting at my cabin looking at the lake when I noticed a black ball fly across the sky. It went from the lighthouse at gull harbor all the way to black island in less than a second. I ran to the dock to get a better view of what it could be, accompanied by a close friend and binoculars, to find that it joined 4 other circular black objects. These objects combined into one circular object and would continuously separate again. Through out its separations it maintained a line formation, however the ends of the line slowly moved clockwise. (Basically a straight line that was rotating as it went, if that makes sense.) It lefts streaks of blue (the light was similar to looking at a flame, but was a streak left from this ship until it slowly faded.) At points, the line would separate extremely evenly, with each ball slowly gliding in the air, going through the trees all together as if looking for something or mapping. They were in sync the entire time until one of the circular objects darting off into a cloud, not coming back. Eventually only one circular ball remained, and it hovered on the beach glinting in the sun. Although the glinting was rhythmic, until we could no longer see it. At some point during it’s flashing it disappeared. No indication of where it went it just completely vanished. The glinting made me think it was metallic but I could not see the true color of the object from my distance. Overall, we sat on the dock watching these things for about an hour and a half. Another person saw it as well and boated over, initiating its final sequences before leaving.
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