In Bay County FL, I was driving south on 77 just south of Sand Hills.at about midday... I looked up at about a 45° angle, a little to the West and saw what I thought was a jet liner heading for the airport... But I didn't see a fear wing. It turned side ways and it was a dark triangle with a berry visible "border" or "frame"... In an instant, the border lit up to a super bright white and it just disappeared.. the whole deal was about 10 seconds. I would estimate it's size at 200 feet due to how clearly I saw it.