Riff#1. Slow..4/4 timing.(2X)
E|----------------------------------------| |
B|----------------------------------------| |
G|----------------------------------------| |
D|5----5----5----5-------------------3----| |
A|3----3----3----3----3----3----3----1----| |
E|3----3----3----3----1----1----1----1----| |
 S    S    S    S    S    S    S    S

Riff#2A. Slow..Same timing as riff#1.(1X)
E|-----------------------------------------------------------------|
B|-----------------------------------------------------------------|
G|-----------------------------------------------------------------|
D|---------------------5----5----5---------------------------------|
A|3----3----3----3--5--3----3----3----6----3----3----3----3-----5--|
E|1----1----1----1--3--3----3----3----4----1----1----1----1-----3--|
 S    S    S    S     S    S    S    S    S    S    S    S

Riff#2A continued..
E|---------------------| |
B|---------------------| |
G|---------------------| |
D|5----5----5----------| |
A|3----3----3----6--5--| |
E|3----3----3----4--3--| |
 S    S    S

Riff#2B. Slow. Pick moderately on the palm muting.(1X)
E|------------------------------------------------------| |
B|------------------------------------------------------| |
G|------------------------------------------------------| |
D|------------------------------------------------------| |
A|3----3----3----3----6--5------------------------------| |
E|1----1----1----1----4--3--3-3-3-3-3-3-3-3-3-3-3-3-3-3-| |
 S    S    S    S          . . . . . . . . . . . . . .