EDITED: This is where I’ve got to, now.
Starting with a single triangle, I’ve worked up to 3D blocks, clothed in texture or color, and then built a dice to show off several techniques, including using different parts of one image to clothe an object.
This is the final result
Code here: http://pastebin.com/tcEdk8W5
If you paste it into Codea, do it by holding down the new project button and selecting the paste into project option when it comes up. This ensures the code will split itself correctly into tabs.
The important thing is not how impressive each animation is, but how useful and clear the code is, and I’ve included a lot of explanation in there to help people understand what can be difficult concepts. My own understanding is not far ahead of where I’ve got to, so I’m learning as I go (and kind of explaining to myself).