Stadium sized triangular craft with red blue and green lights hovered over trees in silence on Ga. night 1985 /6

This was a long time ago and frankly it took me a long time to assimilate the memory.
I was driving home from school for Christmas break and I was in the middle on the countryside between Savannah and Warner Robins Air Force Base, but slightly south, if you were to draw a line. It was a clear night and the sky was filled with stars. I noticed there were several cars pulled to the side of the road in front of me. There was no other traffic and they still had lights on etc. People were standing by their cars and looking southeast over a field and above a pine forest. When I looked I saw a triangular shape that was indescribably huge. It was defined by colored lights. I think they were red blue and green, and I think they were in the corners and maybe along the edge of the triangle. It was hovering not far above the trees at a distance of maybe a couple or three hundred yards from yhe road. Even at this distance it was enormous, as if a football stadium had taken flight. Of course, as things go, this is all I can remember. I didn't even remember this for a long time and even then I wasn't sure it was real until I heard someone describing the same thing on Coast to Coast with Art Bell. The memory loss I can not explain but I understand that it is not entirely uncommon, although these days more people seem to be seeing these things.
I can't imagine that it was man made...we are simply not that scientifically advanced. It was huge, motionless, and silent.