4 perfectly spaced white lights, traveling slowly, until the lights disappear 1 by 1.

On December 3rd, 2020, at 18:42, I walked out of my house in Phoenix, AZ with my dog to go for a walk. I walked about 8 paces down my walkway from my front door and looked up at the sky (as I always do). I immediately saw 4 PERFECTLY spaced lights moving slowly. The lights were white, just like the stars, and there was no trail of any kind. I was confused at first as these lights didn't belong to any of the constellations or normal organization of the stars. Then I realized they were moving. The lights were heading North, Northeast. I was watching for about 10 seconds then the lights started to turn off or disappear 1 by 1, starting with the most Northern light (or the light farthest to the right). There was an airplane flying more North of these lights, heading Southeast, at what appeared to be a lower altitude. It was simply extraordinary. I said I saw 1 or 4 craft because at first I thought it was 4 separate crafts since there were 4 lights. However, late! r that evening, I thought it actually could have been 1 large craft with 4 visible lights since the lights were perfectly spaced and moved with perfect synchronization. The lights (or craft) were directly west of the Cassiopeia constellation (through Pegasus, according to Google Sky). The lights were a bit bigger than the rest of the stars in the sky which made them noticeable as well. So amazing.