Fritzing Creator Kit - #15 Processing RGB
Use the attached RGB Processing file.
Furthermore, if you haven't done it yet, you have to download the Standard Firmata program library to prepare Processing for Arduino. http://playground.arduino.cc/interfacing/processing Open the Processing Sketchbook folder. (You will find the path if you go to Processing and click on Processing > File> Preferences.) If the Sketchbook folder still hasn't got a libraries folder, create one yourself. Pay attention to the spelling: libraries. Then copy the Firmata program library into the folder. The library will be automatically loaded when you run Processing.
Start up the program Sketch > Run. Selecting the port The Processing window has a black output area at the bottom. When the program is launched, all connected devices are displayed. Remember the number that appears at the beginning (e.g.: 0) of the line referring to the Arduino. On a computer running Windows, it is usually the last entry (eg COM3), on a Mac it is the first or the last entry (z.B. dev/tty/usbmodemfa141). Close the program, and insert the number into the program code line: myArduino = new Arduino(this, Arduino.list(), 57600);