This is an alternative playing style from the one made by joey_c_13 and based on my hearing.

Intro: Add this in the beginning of your intro. You'll hear it.
E|-----|
B|-----|
G|-----|
D|-2-2-|
A|-2-2-|
E|-0-0-|

Riff 1: This pattern is used throughout the song.
E|----------|
B|----------|
G|----------|
D|----9---7-|
A|---10---9-|
E|-0----0---|

Riff 2: Sometimes you'll hear this.
E|------------------|   ------------------|
B|------------------|   ------------------|
G|------------------|   ------------------|
D|----9---7---9--10-|OR ----9---7--10---9-|
A|---10---9---9---9-|   ---10---9---9---9-|
E|-0----0---0---0---|   -0----0---0---0---|

Riff 3:
E|----------------------------------------------|
B|----------------------------------------------|
G|----------------------------------------------|
D|----------------------------------------------|
A|---10---10---10---10---10---9---9---9---9---9-|
E|-0----0----0----0----0----0---0---0---0---0---|

E|---------------------------------------------------|
B|---------------------------------------------------|
G|---------------------------------------------------|
D|--------------------------------------10---10---10-|
A|---10---10---10---10---10---12---12----------------|
E|-0----0----0----0----0----0----0----0----0----0----|

Chorus:
      Em   G    Am   C
E|-------------------------|
B|-------------------------|
G|-------------------5-7-5-|
D|----2----5----7----5-5-5-|
A|----2----5----7----3-3-3-|
E|----0----3----5----------|

Bridge:
E|---------3---------3----------8----------10----|
B|---------4---------3----------9----------11----|
G|---------5---------4---------10----------12----|
D|-------------------5---------------------------|
A|----3-------------------8----------10----------|
E|--------------3--------------------------------|