Need help building this module

I am brand new to Arduino and would like to build a module shown on YouTube. It is a 12 LED circuit, where each LED glows in sequence from left to right without the one before it extinguishing, until they are all lit, and then each one goes out from right to left. It also generates a sound that increases in frequency as each LED lights.
It’s called a Surveillance Mode Unit by Trabi77.de
Thanks so much,
ChrisO

Here is the link to the YouTube video:

ChrisO

Its probably based on this :

It should be pretty simple, look at the knight rider example linked and that should help you a lot. You just don’t want to turn off the LEDs straight away, also if you look around the arduino site there are various ways of playing sounds with the arduino.

Mowcius