I purchased some new polarized sunglasses for a road trip and was on my way home when I noticed the distinction of the clouds and how there were crazy designs in the sky making for strange patterns... So much so that I pulled over to look at. The whole sight before me looking east from hwy 12 strongly resembled both the jpanese flags and contrails from old world war 2 bombers in formation. I then continued on my way when I noticed a black object under cloud cover hovering over a hill area, then sharply and quickly took off in a northern direction towards northern Santa Rosa until i lost sight of it. I Felt perplexed over what isaw and looked to see if anyone else saw but they were busy driving going about their days. It departed with the speed of afighter jet but no sound. At one point it did seem to morph and was difficult to focus on and drive. It seemed to transform and while doing that,have aconstant rotating while continuing north.