Line-rotations on mouse-movement

Hi Kirupa’s out there!

I’m a little bit stuck on re-creating an effect.
To be honnest I really don’t know how to begin with it or how I should call the technique behind it (guess I’m still a newbie).

The effect is here: to be seen (it’s that mouse-effect).

Question is, if you guys would be so kind to help me getting started (just were I could find a proper tutorial or something)