shift register controls LEDs

I got 3 shift register chips with Arduino to control 8 RGB LEDs for my final project :). After watching tutorials, I found something interest. 

In this project by Davide Coppola, an 8-bit shift register is controlled to animate a short strip made of 8 colored LEDS.
The animation is the simplest possible: only one LED at a time is ON and the one which is ON moves back and forward bouncing from one side of the strip to the other.

http://www.nudatech.com/blog/using-a-shift-register-74hc595n-with-arduino/