Feature Request: Fade-out and fade-in on loop

[carlosperate]

It would be nice to have the option to add a fade-out to black or fade-in to the first frame when the GIF is about to loop, makes it easy to identify when the animation has ended.
While the delay between loop iterations does help, in screen recording session where there is little changes it's still hard to notice when then loop has started again.

This is an example of what I have normally done in the past: