Arduino Mini Pro measuring distance, displaying in OLED, and playing Darth Vader

Hello!
I would like to show my assembly where I put together in an Arduino Pro Mini board the measuring of distance with a HC-SR04 sensor, displaying the distance in a OLED display (Picaso from 4D), playing a beep with frequency proportional to the distance (f = 40*d), and just to have fun, playing the Darth Vader theme. The Darth Vader theme is activated if the measuring is 10cm for three times consecutively. This part I thank to Carlton Shepherd who shared the code (Imperial March using Arduino - Pastebin.com).
See my video: Arduino distance measure, display OLED, and showtime at the end - YouTube
Luciano

That's a great project, would you be willing to share the sketch and schematic/wiring?

Sure! There is just a little contribution of mine. I got the main parts of the code from Web: The Oled, the music, and the measure from the ultrasound sensor. And also there are a lot of functions and code not used. I was just testing and didn't clean up. Here it goes:

sketch_oct27a.ino (11.4 KB)