shows a photograph of the current time, with the photo changing every minute of the day (all 1,440 occurring minutes on Earth!) Thus you end up with a rotating picture clock sorta deal.
How the time is actually displayed is a whole different matter. A lot of photos have the time written on a crummy cardboard sign, while other photos might have the current time in a more edible format, such as olives. There are photos below sea level and ones over two miles above sea level.