This was an experiment I worked on back when I was at Sony. While our team was working on the Playground space, one of my coworkers came across GML: Graffiti Markup Language. That seemed like an opportunity to me, so I implemented a minigame that would render a given GML file onto a screen within Home.
The implementation was fairly simple- just drew dots as found in the GML file, with lines to connect them. GML files also include time information, which makes it possible to have the result feel like it’s actually being drawn as the rate of drawing speeds up/slows down in response to the shapes being created.
See below for video of it in action.