Five bright lights in the sky flying in various formations for about 20 minutes.

I was on my way home from a night class. It was a very clear night, when I had parked in the driveway I sat on my car hood to watch the stars for awhile before I went in for the night, To the north I noticed 5 lights roughly the same height as a plane landing at Vancouver international airport. The lights with a bright white color and basically looked like stars, with a difference. These five lights moved in unison for left to right, In a zig-zag pattern. Would make sudden stops and quickly start moving again, They would form a line or go into a pattern formation. This lasted for about 15-20 minutes. At that point they flew in what I would assume in a direction leaving the atmosphere and disappeared. The following morning on a local radio station a dicussion was going on with callers and the DJ about what people had seen the night before. The DJ had video taped the event and at a later date I did see it on the show Sightings along with an interview with that DJ. From the distance of these lights to my home I would assume they would have been over the Fraser River.
Date may be approximate.  Witness elects to remain totally anonymous.  PD