The full paper can be found at https://soft-dev.org/pubs/html/hughes.... The animation renders each git commit in the paper's history as a frame, with the time of the commit shown in the bottom right. Commits that have a git tag associated with them (representing “releases” of some sort or other) pause the animation for a couple of seconds showing, in red, the tag name alongside the time. Within the paper itself, text in red represents a comment, or question, from one author to another. Not every version of the paper is perfectly rendered, but the imperfections are relatively minor.