4 white lights in a diamond shape, expanded, contracted and flew towards the ocean.

I was outside laying down looking up to the sky. I saw many commercial airlines and a few smaller planes on their flight path of North to South. The lower ones coming into LAX. I noticed their size. Coming from the east to the west over the ocean I saw 4 white lights in the shape of a diamond directly above me. It appeared to be a bit larger than the commercial airlines but seemed so much higher up. It expanded its shape but retaining the diamond but shifted a bit then contracted back and flew towards the ocean. It was moving much faster than any plane I had seen and much faster than any plane is capable of flying. When I first saw it I instantly knew it was different than anything I had ever seen before. And I commented "What in the world is that?" My friend who could not see it said from what I described he felt it was a ufo. He had a sighting a few years back but it was just one light and its behavior was unlike any flying object of earth origin.