awk-fire
After seeing BruXy's BASH on fire page (http://bruxy.regnet.cz/web/linux/EN/bash-on-fire/), I thought (yet again) "I can do that better in awk!" and started writing :-)
Half an hour or so later I had my first working version and here it is. It could definitely use quite some improvements and features that I have in mind, but that's for later.
Here's a static image of the result:
