The gifs were hand drawn in GIMP and Paintshop. In order to use them with Tk as internal -data you have to base-64 encode them. As an added step I then put that N12N trick in to shorten them up a bit (otherwise there were lines and lines of identical text -- unused colormap entries).

They're terrible little images. If I didn't mind copyright infractions I'd have F12's the real thing from xmame.