UFO Triangle Formation 5/30/18 over London (Canada) Ontario reported

There were clearly unexplained phenomenon at this time and they were not airplanes. There were 6 UFO's that looked like they were playing follow the leader. There was no direct flying course. They were all white looking no flashing lights just stayed white. They were clearly following the lead UFO we first spotted them to the east and they quickly went south then turned north west and headed west before we lost sight. If I could draw these UFO's they’d look kinda like white para-gliders that were moving at a phenomenal rate and flying formations that are only possible with birds. They were turning and swapping places quickly. There were clearly three other airplanes in the sky around the same time.