Pretty much repeats through the entire song. Not sure if the 
guitarist switches to full chords or not after the intro but 
this sounds fine throughout the whole song either way. I will 
throw in a second riff also that you can play around with if 
you want to add in more power at any point in the song.

Let the A string ring as you play the whole riff and palm mute 
any strings you aren't playing as you go along. This simple 
riff just repeats throughout the entire song.

E|-1-1-1-1-1-1-1-1/3-3-3-3-3-3-3-3/5-5-5-5-5-5-5-5/1-1-1-1-1-1-1-1/|
A|-0-----0-----0---3-----3-----3---5-----5-----5---1-----1-----1---|
D|-----------------------------------------------------------------|
G|-----------------------------------------------------------------|
B|-----------------------------------------------------------------|
E|-----------------------------------------------------------------|

And for extra power!

E|-----------------------------------------------------------------|
B|-----------------------------------------------------------------|
G|-----------------------------------------------------------------|
D|-----------------5-----5-----5---7-----7-----7---3-----3-----3---|
A|-3-----3-----3---3-3-3-3-3-3-3-3/5-5-5-5-5-5-5-5\1-1-1-1-1-1-1-1-|
E|-1-1-1-1-1-1-1-1-------------------------------------------------|

This is the first tab I can ever remember submitting so please 
let me know what you think, if you have any comments, or would 
like help with a different song.

Best wishes,

  ~Gabriel Raiano~ nraiano at googlemail dot com