Points of light maneuvering in upper atmosphere

Flying a corporate jet at 43000 feet on a 290 heading. First saw several lights (usually 2 turning circles or zipping up and down diagonally but sometimes up to 4) at extremely high altitude at great distance at our 10-11oclock over Oklahoma City. So to the southwest of our position. These lights came in and out of sight at about 5 minute intervals for approx 1 hour. Also varied in brightness from very bright to dim with no apparent pattern to that. Always staying in exactly the same place in our windshield so they paved us for at least 400 miles.