There's basically 2 main riffs throughout the song
riff A
G----------5-----------7----------|
D----5-----------7----------------|
A--------3-----------5--5---------|
E--3-----------5------------------|
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riff B
G---------------------------------|
D---------------------------------|
A----3-3-----5H7-7-5-0------------|
E--3---- 5--5---------------------|
This is just the basics to start you in the right direction, he usually throws fills in on D
