My brother and I were driving from Martinez to where we were staying in Benicia. As we were heading northwest on 780 about to exit I looked to the north and noticed an orange light traveling at a high rate of speed and then seemed to stop. It then did a very tight circle and a second one appeared and they were flying around as if chasing each other. We lost sight of them behind some trees and when they appeared again one had vanished and we lost the last one behind a hill. Both were orange balls of light.