I think this is the right version.

Intro:
e|---------------------------------|
B|---------------------------------|
G|---------4-----------4-----------|
D|-2-2-2-2-4---2-2-2-2-4-----------|
A|-2-2-2-2-2---2-2-2-2-2-----------| 2x
E|-0-0-0-0-----0-0-0-0-------------| 

e|---------------------------------|
B|---------------------------------|
G|---------4-----------4---------4-|
D|-2-2-2-2-4---2-2-2-2-4---------4-|
A|-2-2-2-2-2---2-2-2-2-2---------2-| 1x
E|-0-0-0-0-----0-0-0-0-------------|

e|---------------------------------|
B|---------------------------------|
G|---------4-----------4---4-8-4---|
D|-2-2-2-2-4---2-2-2-2-4---4-8-4---|
A|-2-2-2-2-2---2-2-2-2-2---2-6-2---| 1x
E|-0-0-0-0-----0-0-0-0-------------|

e|---------------------------------|
B|---------------------------------|
G|---------4-----------4---------4-|
D|-2-2-2-2-4---2-2-2-2-4---------4-|
A|-2-2-2-2-2---2-2-2-2-2---------2-| 1x
E|-0-0-0-0-----0-0-0-0-------------|

e|---------------------------------|
B|---------------------------------|
G|---------4-----------4-----------|
D|-2-2-2-2-4---2-2-2-2-4-----------|
A|-2-2-2-2-2---2-2-2-2-2-----------| 1x
E|-0-0-0-0-----0-0-0-0-------------|

e|---------------------------------|
B|---------------------------------|
G|---------4-----------4-----------|
D|-2-2-2-2-4---2-2-2-2-4-----------|
A|-2-2-2-2-2---2-2-2-2-2-----------| 2x
E|-0-0-0-0-----0-0-0-0-------------|

After that the verse beginns. 
The beginning is without the guitar.
Listen to the music to know when you have to play this riff or not:

e|---------------------------------|
B|---------------------------------|
G|---------4-----------4-----------|
D|-2-2-2-2-4---2-2-2-2-4-----------|
A|-2-2-2-2-2---2-2-2-2-2-----------|
E|-0-0-0-0-----0-0-0-0-------------|