4 circular white lights darting/chasing each other behind cloud cover.

The night sky was 75 % cloud covered from on/off rain storms. There were 4 white circular shaped lights just behind the cloud cover that were darting very rapidly round and round and back/forth. After minutes of watching them, it seemed as though they were chasing each other. One light seemed a little larger and the other 3 lights may have been chasing after it as it seemed to be either in the lead, or the main one that was flying away from the other 3. It was difficult to tell. There was no sound at all. All 4 of the white lights remained just behind the cloud cover, shining through them as they darted around and around then back/forth at a very fast rate of speed. It was very cold outside so I finally went indoors, leaving the lights still chasing each other. I have no idea how long they were flying around before I went outdoors to walk my dog, and noticed them. All 4 lights darted/turned and changed positions in the sky "on a dime", nothing any plane could do.