[magick-users] invert colors of animated gif?

[Patrick J. Collins]

I have an animated gif image of a progress spinner which I am trying to use on
a black background, however the spinner has some white pixels around it which
makes it look pretty bad.

I am curious if imagemagick has a way to invert the colors on all frames of
a gif image?  And if so, how to do it.

Thank you.

Patrick J. Collins
http://collinatorstudios.com