Serial Communication Arduino UNO & Processing (testing)
I followed the documentation from the ITP Physical Computing page. (The only thing I did not follow from the documentation was the step with CoolTerm because apparently the latest version of the software for Mac does not work with)
Here is an image showing the success of the Serial Communication from Arduino to Processing.
Here is a list of the materials I have available at home in my Beginner Kit for Arduino Uno.