2020-05-21 - Louisville, KY - Circle

As the sun was setting, I was gazing at the horizon marveling at the beautiful sunset, when I noticed some bright almost glowing circular shaped objects that were almost coming outside of a cloud moving from right to left but in a zigzag pattern and then disappearing inside the cloud and sometimes disappearing as they went up towards the sky. They were probably several miles away and what looked to be about several thousand feet up. From my vantage point they were relatively small, but large enough to be very noticeable. At one point there were several visible in the sky at once but for the duration generally one object would become noticeable then disappear as another object became noticeable. I am very certain that these were not birds as they flew rather fast and disappeared. I can't be certain however, but I don't submit something like this if I don't believe this was something extraordinary. I heard no noise they left no Trail but they fluctuated in they're glowing intensity.