This is only one of the riffs they play; they vary a lot:

E?-----------------------------------------------------|
B------------------------------------------------------|
G-9-11----11-7----7-6-2----2-4-6-4---------------------|
D------------------------------------------------------|
A------------------------------------------------------|
E------------------------------------------------------|

After a while, they start adding notes (again, there?s a lot of variations):

E?-----------------------------------------------------|
B------0-----------------------------------------------|
G-9-11----11-7-0--7-6-2----2h4-2h4-6-4-12-11-----------|
D------------------------------------------------------|
A------------------------------------------------------|
E------------------------------------------------------|

Then, they play this riff four times:

E?7-2--2-7---------------------------------------------|
B----0------3--3-7-3--3-5-2-0--------------------------|
G-----------0------2------2----------------------------|
D------------------------------------------------------|
A------------------------------------------------------|
E------------------------------------------------------|

Then end with this riff:

E?7-2--2-7--------0---0----0---0-----------------------|
B----0------3--3-7-3-3--0--2-2---2---------------------|
G-----------0------2-------2---------------------------|
D------------------------------------------------------|
A------------------------------------------------------|
E------------------------------------------------------|


They play these chords 12 times (with slight variations) and continually increase the tempo:

E-2-2-0-0-2-2-2-2-2-2-2-2-0-0---------3-3-2-2-0-0------|
B-0-0-0-0-0-0-3-3-0-0-3-3-----3-3-2-2-3-3-3-3-0-0------|
G---------------------------2-2-2-2-2-2----------------|
D------------------------------------------------------|
A------------------------------------------------------|
E------------------------------------------------------|