The last formation of more than one, before it was just one a minute until dawn. I watched hundreds go by. All I had was an I phone at night. One was brighter than the rest and it was spinning slowly, clockwise from 5 to 11 o’clock as it flew the same path as the others. When it turned its far side towards me, it was hella bright like a strobe. The rest of them were consistent light like you’d expect from a satellite. But these things were at about thirty thousand feet. In the beginning of this, they were lower. I could hear their hum. Over the hour I witnessed hundreds of these things, come from northwest, going towards Sacramento from my perspective. Interesting fact. If you keep heading on that path. You eventually go over Area 51.