bright rotating colors, two objects, one large and one much smaller.

A round ball was hovering above the trees in our backyard. It had many different, bright, crystal clear colors rotating on it.  Disappeared when I went outside.  No engine noise.  Cloudy night; no moon or stars. The object was about the diameter of a full sized split foyer house if looking at it from the side view.  It disappeared when I went outside. I went to the back of our property and looked out over this open pasture and about 1/4 to 1/2 mile away was a small round white object about five feet in diameter flying in a very erratic fashion about 5 feet above the ground. I spoke to a neighbor the following day, and he said that he saw something hovering above the national guard armory which is close to our house, but he wouldn't answer any of my questions after that. I may mail a more complete description of my sighting to you.