I want to put an end-comment on the last frame, or last few frames, to display at end of movie for as long as the viewer wants it to be there while he reads it. But movie-displayer programs vary in what they do at the end of the movie:-

(1) Continue showing the last frame until the viewer tells the displayer to go on to something else.

(2) Stop showing the movie at once.

(3) Restart the movie, in a loop until the viewer interrupts.

My first movie-displayer program did (1).