Large triangular shaped object over nellis air force base

On the evening of March 1st I was driving north up nellis Blvd .in north las Vegas heading home .I got up to the entrance to my apartment complex when I looked up in the sky .just over the nellis air force base I noticed a large triangular formation of 4 white light objects . stationary in the sky the size of a football field maybe bigger .I pulled off the road into a store parking lot and watched .there were three objects that had formed a triangle shape the fourth object just hovered at the top point of the triangle.the two lower points of the triangle rose up to meet the other two lights and blinked out .along with the fourth white light object.the object that created the top point of the triangle shape .then proceeded to slowly move in a north east direction.after about a minute the other objects. Blinked back into view they were alot closer together all four objects made no noise what so ever