Over Twenty White Dots in a line ~ Some Flared ~ Rancho Mirage, CA

Last Saturday night, May 22, 2021, in Rancho Mirage, California (Palm Springs Desert Area) at 9:44 PM, I was in my backyard, facing  316 degrees North West, standing in the middle of the lawn with my friend. (Please note ~ that my backyard is open with unobstructed views of the sky and it was dark) Then out of nowhere, about thirty miles away, a U shaped group of six white dots were leading a line of  three white dots that were spaced exactly apart. Then new white dots kept appearing at the end of the line, one behind the other, from the exact same spot, adding to the line. This white dot line grew to about twenty white dots, some would flare and continued moving North and then disappearing around 344 degrees North.  It was almost as if these white dots were being born, like a large dog litter one after another and then getting in line to follow their mother. This sighting took about two minutes total. My friend captured over one minute on his cell phone if ! you'd like to see it.