4 Small White Circular UFOs flying around in random patterns over Southern California

I was on my way to my car with a co-worker, when I noticed 4 small white UFOs in the sky. I took my sunglasses off and could not see them without my sunglasses on and actually handed my sunglasses to my co-worker so he could see them. Once he saw them, we watched them circle each other and move around the sky randomly, almost as if they were playing with one another. I noticed that a helicopter was flying nearby and these UFOs were much higher in the sky than an helicopter.

As we watched, we noticed that at one point all of them turned and the sun hit the UFOs creating 4 bright small circular objects in the sky. We continued to watch them for about 4-5 minutes until they flew off into the distance away from the Orange County airport heading south about 20 miles inland from the coast. The way these UFOs were flying, was almost as if they were birds playing in the sky, darting in and out and up and down and circling one another not at all! How commercial planes or helicopters would fly. All 4 UFOs were the same size, they were white and when the sun hit them as they moved it shined a large glare off the UFOs. UFO Sighting occurred 4/6/17 Anaheim CA nuforc.org