Theo is using a ds106 toy I made a while back. I don’t think I’d really though much about the use of cubomaina images.
Cubomania Gif! makes still jpgs too. I just changed it a little to keep the still images fullsized but resizing gifs to a more sensible 400 pixels wide.
The images in Theo’s post are a lot more illustrative of his ideas that the one here.