Riff A - Intro
---------------------------------------------------------|
---------------------------------------------------------|
---------------------------------------------------------|
--2-3-3-3--3-3--2-3-3-3--3-3--2-3-3--2-3-3--2-3-3--2-3-3-|

Riff B
--------------------------|
--------------------------| x 3
------------------3--2--3-|
--3-3-3-3-3-3-3-3---------|

----------------------------------|
----------------------------------|
----------------------------------|
--3-3-3-3-3-3-3-3-3-3-3-3-3-3-3-3-|

Alternate Riff B
--------------------------|
--------------------------| x 2
------------------3--2--3-|
--3-3-3-3-3-3-3-3---------|

--------------------------------------------------------------------|
--------------------------------------------------------------------|
------------------5-5-5-5-5-5-5-5-----------------------------------|
--3-3-3-3-3-3-3-3-----------------3-3-3-3-3-3-3-3-3-3-3-3-3-3-3-3-3-|

Riff C
---------------------------------|
---------------------------------| x 4
--5-5-5------4-5-5-5-5-5-5-5-5-5-|
--------5--5---------------------|

Riff D - Guitar solo
----------------------------------------------------------------------------------------|
----------------------------------------------------------------------------------------|
--2-2-2-2-2-2-2-2-0-0-0-0-0-0-0-0-2-2-2-2-2-2-2-2-0-0-0-0-0-0-0-0-2-2-2-2-2-2-2-2-0-0-0-|
----------------------------------------------------------------------------------------|

-----------------------------------------------------------|
-----------------------------------------------------------|
-0-0-0-0-0-2-2-2-2-2-2-2-2-4-5-5-5-4-5-5-5-4-5-5-5-4-5-5-5-|
-----------------------------------------------------------|

Riff E - Outro
---------------------------------      ----------------------------------|
--------------------------------- x 3  ----------------------------------|
--3--3-3-3-3-3-3-2-2-2-2-0-0-0-0-      ----------------------------------|
---------------------------------      --2-3-3-3-3-3-3-3-2-3-3-3-3-3-3-3-|

-------------------------------------------------|
-------------------------------------------------|
-------------------------------------------------|
--2-3-3-3--3-3--2-3-3-3--3-3--2-3-3--2-3-3--3----|

to know when you have to switch between Riff B and Alternate Riff B just listen to the 
other than that its pretty simple