Small group of colored lights, red, green, yellow, hovering in a bobbing around motion above horizon.Unidentified flying object sighting: At approximately 22:20 on September 14, 2014, I stepped out the door of my computer room, which faces the west, in order to see if I could see any Northern Lights. I did not see them.A small group of colored moving lights caught my eye. It was approximately due west of my house in Centralia and just above the horizon, which in this case is a hill known as Cooks Hill. The lights were just above the hill, probably at around 15 – 20 degrees elevation from a true level horizon.The light was bobbing around in one area and not moving in any one direction. I watched for about five minutes and then went to get my binoculars. With the binoculars, it was more clearly about four lights. They were positioned with a green light at the top, then perhaps two red lights in the middle, and another green light at the bottom. There was also the typical yellow light amongst them but it was hard to hold the binoculars steady so that there was some jiggling of the object. The small area covered by the lights would be about the size of the full moon. The yellow, red and green lights, in size and brightness, were much the same as airplane lights in size and brilliance. But if they were from an airplane it was not going anywhere. I watched for about ten minutes, total, and the small group of lights just bobbed around, up and down, side to side, much as a fishing bobber that was being dangled above the water but not in it. I could hear no sounds of an aircraft.When I went to turn on my computer at 22:29, in those few seconds, the object(s) was gone.It could possibly have been a helicopter but the prolonged bobbing around motion in the same spot does not seem like a practical explanation. The area over and beyond Cook’s Hill is mostly wooded but with homes along the rural Cook’s Hill Road. When I last looked at the area of the sighting, at 23:00, they had not reappeared.