Perspective Text Puzzle

In this video, I'll describe how to create a secret text message written in such a way that it only appears correctly when viewed from a certain perspective. This is an example of *oblique anamorphosis*, and is the same technique used for the markings in sports stadiums that are designed to appear correctly when viewed from the television camera, but look very odd from the ground! I'm using the open-source vector graphics software Inkscape, which is available from https://inkscape.org/