I was heading westbound on i76 on 12/15/18 at about 6:10pm. i looked out my driver's side window (south) and saw 4 white lights in a vertical line. i initially thought i had never noticed a radio tower there. then i continued to watch. the 4 lights grouped together. 1 faded out then reappeared. then 2 faded out and reappeared in a diamond formation. they started to separate as they descended on the horizon. that was when i was able to pull out my phone and capture them as they were low on the horizon.