Bright Stars in Sky were actually a UFO's

Taking my dog out one last time for the night, I looked up in the clear night sky and saw what appeared to be 2 really bright stars....As I stared at these particular stars, I thought I noticed that one of them turned a red color for just a quick second. I continued to stare at the star, and sure enough, it turned red again. Watching even closer, I could see that it was alternating it's color (like an orb) from the bright color of a star to red again, over and over again. As I was watching in wonder, I could see out of the corner of my eye that the other bright star just to the north of the one I was watching, I could see that the second star was also alternating it's color to red and back again. Airplanes? NO WAY!!!! These were definitely UFO's...Only wish I had the presence of mind to run back inside the house and grab my camera, but I guess I was just too mesmerized by it all.