this is the main riff

e-------------------------
b-------------------------
g-0-0--3-5-3--5----3-0----
d-0-0--3-5-3--5----3-0-3--
a----------------------3--
e-------------------------

e---------------------
b---------------------
g-0-0--3-5-3--3---5---
d-0-0--3-5-3--3-3-5---
a---------------3-----
e---------------------

i just worked this out so it may not be right but it sounds right.