The entire intro is in a pattern of triplets, so pay attention to that. 

Part A:                                              (x2)
e|------------------------------------------------------|----------------------------------------||
B|------------------------------------------------------|---------------------------------0---0--||
G|-----------------------------------------------2------|---------------------------2-------2----||
D|-----6p0---6p0---6p0---6p0---6p0---6p0---6p0-----3p0--|---6p0---6p0---6p0---6p0-----3----------||
A|-----4p0---4p0---4p0---4p0---4p0---4p0---4p0----------|---4p0---4p0---4p0---4p0-------5--------||
D|---------0-----0-----0-----0-----0-----0-----0--------|-------0-----0-----0-----0--------------||

e|------------------------------------------------------|-----------------------------------------0---0--||
B|------------------------------------------------------|---------------------------------0---0-----0----||
G|-----------------------------------------------2------|---------------------------2-------2------------||
D|-----6p0---6p0---6p0---6p0---6p0---6p0---6p0-----3p0--|---6p0---6p0---6p0---6p0-----3------------------||
A|-----4p0---4p0---4p0---4p0---4p0---4p0---4p0----------|---4p0---4p0---4p0---4p0-------5----------------||
D|---------0-----0-----0-----0-----0-----0-----0--------|-------0-----0-----0-----0----------------------||

e|------------------------------------------------------||
B|------------------------------------------------------||
G|-----------------------------------------------2------||
D|-----6p0---6p0---6p0---6p0---6p0---6p0---6p0-----3p0--||
A|-----4p0---4p0---4p0---4p0---4p0---4p0---4p0----------||
D|---------0-----0-----0-----0-----0-----0-----0--------||

e|-------------------------------------------------------0----------------------||
B|----------------------------------------------0------4------0-----------------||
G|---------------------------2------7-----6-------5--------5----5----0----------||
D|---6p0---6p0---6p0---6p0-----3p0----7-----6-------6-------------6----6----0~--||
A|---4p0---4p0---4p0---4p0--------------5-----4--------------------------6------||
D|-------0-----0-----0-----0------------------------------------------------0~--||

Part B:
e|-------------------------------------------------------0----------------------||
B|----------------------------------------------0------4------0-----------------||
G|---------------------------2------7-----6-------5--------5----5----0----------||
D|--1p0h1-1p0h1-1p0h1-1p0h1----3p0----7-----6-------6-------------6----6----0~--||
A|--4-----4-----4-----4-----------------5-----4--------------------------6------||
D|--------------------------------------------------------------------------0~--||

e|------------------------------------------------------|---------------------------------------------------||
B|------------------------------------------------------|---------------------------------------------------||
G|------------------------------------------------------|---------------------------------------------------||
D|-----1p0h1-1p0h1-1p0h1-1p0h1-1p0h1-1p0h1-1p0----------|--6p0---6p0---6p0---6p0---6p0---6p0---1p0----------||
A|-----4-----4-----4-----4-----4-----4---------4p0------|--4p0---4p0---4p0---4p0---4p0---4p0-------4p0------||
D|-------------------------------------------------1p0--|------0-----0-----0-----0-----0-----0---------1p0--||

Then repeat part A in its entirety; then repeat only the first segment of part B, but the development is
thus extended:
e|-----------------------------0----0------0------0------0------0-------0--------0--------------------------||
B|---------------------0-----4--------5------6------7------8------9-------10-------11-----0-----------------||
G|--2------7-----6-------5-------5------6------7------8------9------10-------11-------12----5----0----------||
D|----3p0----7-----6-------6------------------------------------------------------------------6----6----0~--||
A|-------------5-----4-------------------------------------------------------------------------------6------||
D|------------------------------------------------------------------------------------------------------0~--||

**********************************
|p  pull-off
|h  hammer-on
|~  let ring