Bright white, red and green light over whitecourt, ab

As we entered Whitecourt from the North, we noticed two lights in the sky.  One was very obviously a helicopter as it moved slowly through the sky.  The other we thought was a helicopter as it had a bright white light and smaller flashing red light.  The bright white light changed to bright green and the object moved quickly through the sky circling in front of us.  The smaller flashing red light at times swung out quite far from the main light and at times disappeared completely.  As we entered the city, we lost sight of it, but then it reappeared and again circled around at various speeds.