3 ovals in a fixed triangle pattern flashing light in the sky over San Francisco, Sunday morning 11/7/21

San Francisco, CA. Sunday, November 7, 2021 at 9:42am I was driving my car eastbound on Bush St. I just got on the 1700 block to turn right onto Gough, when I looked up into the lower left of my sunroof. I saw in the bright blue sky, a silver southwest plane flying overhead to the west and behind it, bright flashing lights higher in the sky close to some wispy white clouds moving to the west. If I had to place where they were flying over, i would say it was over the Pac heights neighborhood. My initial thought was the lights were airplanes higher in altitude, but I quickly realized they were in a fixed triangle formation and were flashing light between the grey body color and a bright white, like reflection of the sun and they were moving together. But the silver plane that flew by earlier wasn’t reflecting any sunlight in the way the ovals were. They were 3 ovals fixed with each other in an equilateral triangle and they floated very slowly and I could tell ! because they were moving and the cloud behind it they were up against was sometimes coming in front of the ovals as they passed through it. They flashed sometimes at the same time and sometimes alternately. The best way I can describe the flashing is if they were coins and when they flipped around they flashed light. The flashing lasted maybe a half second and then went back  It wasn’t quite regular. The whole experience lasted maybe 20 seconds while I was waiting for the light to change behind several cars. When I looked down to drive, a couple seconds later I looked up and they were gone.