There were two groups of these lights flying directly above my address area going back and forth west and east direction. it started with boomerang( > ) shape and would quickly change its formation mimicking like the flock of small birds changes shape mid-air. there were planes flying by too, but the planes were much slower in speed than these objects. i watched it for over ten minutes. it would show up every couple of minutes in the sky and go either east or west mostly.