Freehold, NJ large disk saucer red and green lights

I was a small child at the time, I was with my mother and a neighbor at an auction at an old horse round house. The auction had ended and everyone went outside. 
The object came down above the roundhouse, made no sound, had red and green lights around the entire outside edge.  Hovered above the house which  produced no wind, then disappeared.  Was the size of the roundhouse and only the height of the roundhouse away from us.  
Everyone at the sight made a huge deal of it and my mother always talked about it, but I have yet to have seen or read anything about it.
Witness indicates that the date of the sighting is approximate.  PD