This entire riff is tremelo
  <-------------------------------------------------------------->
                
G|--------6---5---2-3-4-7-6---------------6---5---2-3-4-------2---| Riff 1A   
D|----5---------------- --------------5-------------------2-1-----|      
G|6-------------------------------6-------------------------------|      
C|----------------------------------------------------------------|      
F|----------------------------------------------------------------|
A|----------------------------------------------------------------|
D|----------------------------------------------------------------|

       
                       Tremelo    
  <---------------------------------------------->    PM
                                                  <--------->
G|--------6---5---2-3-4-7-6---------------6---5---2-3-4-7-6-5-----| Riff 1B     
D|----5-------------------------------5-----------2-3-4-7-6-5-6-5-|      
G|6-------------------------------6---------------2-3-4-7-6-5-8-7-|      
C|------------------------------------------------------------8-7-|      
F|----------------------------------------------------------------|      
A|----------------------------------------------------------------|      
D|----------------------------------------------------------------|      

        
                    
G|6-6-5---3---6-6-5-8-6---3-3-2---6-6-5---3---6-6-5-8-6---3---3*--| Riff 2     
D|6-6-5---3---6-6-5-8-6---3-3-2---6-6-5---3---6-6-5-8-6---3-------|      
G|6-6-5---3---6-6-5-8-6---3-3-2---6-6-5---3---6-6-5-8-6---3-------|      
C|----------------------------------------------------------------|      
F|----------------------------------------------------------------|      
A|----------------------------------------------------------------|      
D|----------------------------------------------------------------|      

                        
                   This riff adds a beat at the end

G|2-3---------3-2-0-2---------6-5-6-5---------1-2-1-2-3-2-1-2-4---1---| Riff 3 
D|2-3-2-1-2-1-3-2-0-2-6-5-6-5-6-5-6-5-2-1-2-1-1-2-1-2-3-2-1-2-4---1---|  
G|2-3-2-1-2-1-3-2-0-2-6-5-6-5-6-5-6-5-2-1-2-1-1-2-1-2-3-2-1-2-4---1---|  
C|--------------------------------------------------------------------|    
F|--------------------------------------------------------------------|  
A|--------------------------------------------------------------------|  
D|--------------------------------------------------------------------|  

Play the riffs in this order:

Riff 1A
Riff 1B
Riff 1A
Riff 1B
Riff 2 (x4)
Riff 1A
Riff 1B
Riff 1A
Riff 1B
Riff 2 (x4) note: the 3rd measure of this is played slightly slower.
Riff 3 (x4)

/// * = pinch harmonic ///
/// PM = palm mute