2.exercise 20/11/2013
https://dl.dropboxusercontent.com/u/75505124/2.exercise/zeit/Zeit/index.html
I couldn't figure out how to refresh the size of the rings automatically! After changing canvas size you need to refresh the site.
3.exercise 26/11/2013
https://dl.dropboxusercontent.com/u/75505124/3.exercise/index.html