there are a few around but this is spot on, awesome to play with a couple of mates. try it

e -------------|
b -------------|
g -------------|  x4
d -12-12-12-12-|
a -10-10-10-10-|
e -------------|

e -------------|
b -------------|
g -------------|  x4
d -12-12-12-12-|
a -10-10-10-10-|
e --8--8--8--8-|

e -------------|
b -------------|
g -------------|  x4
d -12-12-12-12-|
a -10-10-10-10-|
e --0--0--0--0-|

e -------------|
b -------------|
g -------------|  x4
d -12-12-12-12-|
a -10-10-10-10-|
e --8--8--8--8-|

this riff continues throughout the whole song. Play it fast, about 130.

Second riff; this can be either e -------12-  or e ----------|
                                b ----12----     b ----12----|
                                g -12-------     g -12----12-|
                                d ----------     d ----------|
                                a ----------     a ----------|
                                e ----------     e ----------|
i think its the first one. this comes in after the 2nd verse

Further on in the song you get this riff

e -15-15-15-13-13-13-12-12-12-10-10-10--8-8-10-10-------------------|
b --x--x--x--x--x--x--x--x--x--x--x--x--x-x--x--x-------------------|
g -12-12-12-10-10-10--9--9--9--7--7--7--5-5--7--7-------------------|
d ------------------------------------------------------------------|
a ------------------------------------------------------------------|
e ------------------------------------------------------------------|

enjoy, its a great song.
Tip: try changing pick ups on the first riff as the song developes.