This is the intro / main riff witch is been repeated almost through whole song
Not maybe fully right but it really sounds like it.

E|9-9-9-9-9-9-9-9-5-5-5-4-4-4-5-5-7-7-7-7-7-7-7-7-5-5-5-4-4-4-5-5|
B|7-7-7-7-7-7-7-7-3-3-3-2-2-2-4-4-5-5-5-5-5-5-5-5-3-3-3-2-2-2-3-3|
G|---------------------------------------------------------------|
D|---------------------------------------------------------------|
A|---------------------------------------------------------------|
E|---------------------------------------------------------------|