While driving I witnessed a large, saucer shaped craft with a domed top (like a stereotypical flying saucer)

The saucer was large (witnessed at a distance, it appeared to be at least as large as an airplane) and had many lights in multiple colors (mostly red, blue, and yellow). It reminded me of a carnival ride, the colors and lights were so bright. It was low in the sky to the west of me and hovering for roughly 30 seconds to a minute. While driving I passed by some trees and lost sight of it for a few seconds, but came out and was still able to find the craft unmoved from its previous position in the sky. However, when I passed by some more trees, I came out to find the craft had completely disappeared. I could not find it at all, not even distantly, so it would have to have moved very fast to be completely out of the sky in those few seconds I was out of sight of it.