A clock animation is a short clip of a clock showing time passing: the hands sweep round or the digits tick over, from one time to another, in a few seconds. Editors use it as a time-lapse between two scenes, to say “three hours later” without showing the three hours.
This maker runs a clock from any start time to any end time over 1 to 20 seconds. It speeds up, races, and slows to a stop on the end time, then rests there while the second hand ticks on. Choose an analog dial with 1 to 12, just 12, 3, 6 and 9, or no numbers at all; a digital clock whose digits roll over; or a split-flap flip clock.
For a clock animation on a green screen, set the background to green in the Look panel. The dial and the flip cards keep their own color, so only the clock is left once the green is keyed out. An end time earlier than the start runs on past midnight, so 10 PM to 6 AM works as an overnight time-lapse.