Standard tuning (EADGBe)

This is the same thing throughout. I think anyway. I havn't listened to the whole song.

There's two riffs, I don't know which one sounded better. Choose whatever is best for you.

e|-6--6-x-6-6-6-6-x-5-x-3-3-3-3-|
B|-6--6-x-6-6-6-6-x-6-x-4-4-4-4-|
G|-7--7-x-7-7-7-7-x-x-x-x-x-x-x-|
D|------------------------------|
A|------------------------------|
E|------------------------------|

OR

e|-6--6-x-6-6-6-6-x-5-x-3-3-3-3-|
B|-6--6-x-6-6-6-6-x-6-x-4-4-4-4-|
G|-x--x-x-x-x-x-x-x-x-x-x-x-x-x-|
D|------------------------------|
A|------------------------------|
E|------------------------------|

Figure out the timing rhythm for yourself. Just listen. 

Just repeat it over and over again.