Blue light in the dusk sky turns red on video that hovers and changes directions and then descends.I was walking my sisters dog around the subdivision when I noticed a bright blue circular light from the corner of my eye. I paid it a little attention because it was the biggest light in the sky and I felt it didn't belong there. As the dog was relieving herself I noticed the object began to move and that's when I pulled out my IPhone and began recording. The sphere then turned red and began moving slowly back the opposite way. It then paused and hovered over the trees and shot straight down behind the trees .