We were taking a walk down the street, heading roughly north. what looked like a plane at a high enough elevation to be obscured by clouds at times moved from our right to our left. it was extremely fast. it crossed half the sky in a matter of seconds. it stopped and then disappeared, possibly because it was obscured by a cloud. then it appeared again, only this time it had changed direction by 90 degrees and was moving toward us. after moving about 1/10th the distance of the sky, it disappeared again. we did not see it reappear during the remainder of our walk. i could see red and white lights, but there may have been other colors. it was too small and fast to get a great look.