Main Patterns:  

Riff 1  

G|-------------------------------|   
D|-------------------------------| x2  
A|---9-9--------9-7-9------------|      
E|-------7---7--------7----------|  

Riff 2  

G|-------------------------------|   
D|-------------------------------| x2  
A|---7-7--------7-5-7------------|      
E|-------5---5--------5----------|  

Riff 3 (Play This Entering Verse 1, Also An Alternative Riff)  

G|-------------------------------|   
D|-------------------------------|   
A|-------9------9-7-9------------|      
E|---7-7-----7--------7----------|  

Riff 4  

G|-------------------------------|   
D|------33333-------55555--------| x2  
A|---3-----------5---------------|      
E|-------------------------------|