UFO Sighting in Tampa, Florida on 2017-07-28 00:00:00 - Appeared flashed light dim to extremely bright move a little and repeat

Watching for meteor shower around 12am saw a couple go by, then a dim moved in the opposite direction of the meteor shower and stopped and flashed a extremely bright light, hovered stayed flashing light at different levels of brightness. then started moving again very slow repeating the flashes. ran inside got my binoculars and when it flashed bright you could make out a black shape looked rectangular. then went dim and flew off to the north. i checked the space app and no satellites or rocket bodies were flying over.