How to create this amazing effect?

Hi,

I want to include this amazing effect on my new design
(the running light/neon effect).

what is the easiest way to create it?

please watch it here:
http://www.mgmgrand.com/entertainment/

also, while you check it, click on enter to view one of the most complex videos you ever saw.
please help me with it.

thanks,
b.