Floating disk with red, yellow, green, and white lights appeared and then vanished with a small white flash but NO noise.I was sitting on my porch in my backyard hanging out with friends when I looked up at the sky and I saw a round dick looking object floating in the sky. Some neighbors were setting off fire crackers a few yards down so I originally thought what I was seeing was a fire cracker, however that wasn't the case. This object was floating in one place in the sky and was making no noise whatsoever. It had alternating green, yellow, white, and red lights circling around the exterior of the object, this was how I observed the shape - round disk/saucer. It stayed there for maybe a total of 10 seconds and then it just disappeared with a small white flash, but no noise coinciding with its departure. My neighbors continued to set off fire crackers for the rest of the night but I never saw anything again like what I had seen for that brief 10 seconds.