Some technical notes:
The background music was provided by Stellardrone, a very generous musician who releases all his work under a form of Creative Commons style attribution license.
The cog was first drawn in Scratch and then converted to a sprite. However, you will notice that I should have kept the cog and its shadow separate in order to achieve a more convincing 3D effect when animating them.
The presentation timings are co-ordinated by using five different broadcasts to mark the transitions between the different phases.
The video was recorded using Camstudio – free screen capture software, and then tidied-up and converted to a smaller wmv file using Windows Live Movie Maker.