It was like an airport becon that was rotating with red, green, and white lights.My wife and I observed what we first thought was a bright star or planet in the north western sky. It was like an airport becan that was rotating with red, green, and white lights. When the red and green lights were visible there was a white light that appeared to be under the object. When rotating to white, the object became brighter. It seemed to be stationary for a period appx 45 minutes and then began to move in a northern direction. We observed this object for quite some time as it moved away. It then dissapeared.