Here is an MPEG-4 movie, created by the CVT_MOVIE3 program, showing the evolution of the points in a CVT iteration.
The command which created this movie was
cvt_movie3 400 100000 100(400 nodes, 100000 sample points, 100 frames).
If your browser won't display the movie, perhaps you can download cvt_movie_p08.mp4 to your machine and THEN display it.