Intro [just the first time the riff is played]

E|----------------------------------|
B|----------------------------------|
G|--------7-7-5----------5-7-5------|
D|--------------7-3~-5-7-------7----|
A|--3-4-5------------------------5~-|
E|----------------------------------|

Followed by this riff for the rest of the intro

E|------------------------------------|
B|------------------------------------|
G|----------7-7-5----------5-7-5------|
D|----------------7-3~-5-7-------7----|
A|--3-3-4-5------------------------5~-|
E|------------------------------------|