I was interested to read How to Reverse an Animated GIF
convert water-forward.gif -coalesce -reverse -quiet -layers OptimizePlus -loop 0 water-reversed.gif
So gave it a quick try. The result wa fine, but my 228kb gif was 1.1 MB in reverse. So I had a wee look art the gifsicle man page and ended up after a few tries with:
gifsicle -U stairs01.gif "#-1-0" --colors 32 -O3 -o downstairsR.gif
249kb
![animated gif from black and white film reversed so woman appears to walk down the stairs](https://johnjohnston.info/blog/wp-content/uploads/2022/07/downstairsR.gif)
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