I'm on a walking holiday so unable to try various ideas I've had for achieving the following.
i want to create a video clip, maybe 0.5 s in duration, that I can use as a 'place indicator' on a map. It would pop-up and play just as a moving track (representing a walk/hike or car/train trip) approaches its destination. The part I'm unsure about is the first fraction of a second, when I want a ring (say white) to be traced to form the circle's outer rim. (I'd then fill it with a contrasting colour, either by zooming or fade. I'd also pop up the place name.)
Any suggestions would be appreciated please, even though I'll be frustrated in trying them for a few days!