It is my first time using Processing. I have to say that I have felt excited with this huge tool. It is a big thing for artists, ingeneers, architects, programmers, etc... and for me!

The code I have programmed polygons that can rotate about themselves and, when you press the mouse, about a point. This polygons form the letters IFD.

Working in Arduino
I have conect an ultrasonic sensor SR4 to Arduino. And in Arduino IDE I have charge the code for ultraonic sensor (for measure distances).
The code
I downloaded from the internet an Arduino code for ultrasonic sensors.
Note: in Processing I have installed the serial library to conect with Arduino. Also in the code, I have done adjustments to conect the distances measurements with the sensor SR4 in Arduino with the rotation speed of the polygons in Processing.