At about 9:45 pm I was leaving the equestrian riding arena on my horse I heard a Humming noise and looked towards the sound . To my surprise I saw a huge triangular object with three blue - green lights on each corner along with one red light on one of the corners. The object was moving so slow that I could see the underside which was all black but much darker then the night sky. I yelled for my husband to look at what I was seeing and the few feet from where I was to where my husband was the object just disappear it was completely gone! I wanted to add that I noticed several helicopters.