make animated GIF from a series of JPG files

make_gif.bash

# `convert` is part of Image Magick http://www.imagemagick.org
# The command below scales the images to 500 pixels (in some dimension), 
# imposes a delay of 60/100ths of a second between frames, and loops indefinitely.
# The "-layers optimize" option reduces the final file size by optimizing the GIF frames, with a difference threshold
# controlled by the "-fuzz" parameter. 
convert -fuzz 2% -layers optimize -scale 500 -delay 60 -loop 0 -verbose IMG_*.JPG animation.gif