Saw it out of my cabin window before bed. Was a bright circular shape hovering in the air. Got larger, then smaller, and disappeared.

It was a little bit before 10:30pm and I was getting ready for bed. I walked to my window and immediately saw a very bright light hovering in the air far away. I knew right away that it was not a star or a plane. I grabbed my phone and opened my door and started recording. It was clearly spinning over one spot. It had several colors it would flash and then seemed to get larger, then really small before it just disappeared. After looking at a map I realized it was very close to or over Cooks inlet. Have never seen anything like that in my life. It was also a very clear night and you could very easily see stars and this was no star or plane.