Do the Fun Programming tutorials, starting with "2.
Download Processing. Use point() and line()", and work through as many of these
as you have time for:
2-4, 9-12, 18-23, 29-32, 35-41, 47, 54, 74, 94,
104, 121
http://funprogramming.org/
You can work on the ones you don't finish at
home.
If you prefer the textbook format, feel free to work through the Schiffman book
below instead.
If you are already familiar with the Processing language, come talk to the TAs
or professor.
Once you get comfortable with the language, or finish the exercises, trying
writing your own original program, and post it to the blog!
More about Programming with Processing
http://processing.org/overview/
http://www.openprocessing.org/
http://processing.org/tutorials/
http://processingjs.org/
http://processingjs.org/learning/
Reference: Learning Processing, Daniel Schiffman