Well, here it is. I haven't settled on a title yet. For copyright reasons, rather than post it to the blog, I have made a link to the video on my website here. It is an experimental drawing which, amongst other things, covers some of the issues I have approached in other ways previously. The video is very short (2'12"). The low light and camera noise are intentional. Please let me know what you think (apart from comments about spare tyres, please :p ).