7h8     = hammer-on
8b9     = bend 8th fret to 9th
~       = vibration
E ------------------|
B ------------------|
G ------------------|
D ------------------|
A -2--2--4---5---4--|
E -x--x----0---0----|
          
note 1: pick percussiontone with thumb: in the begin here is just played an E5 chord
note 2: the last two tones are sometimes left out before the transition to riff B or C
note 3: mute open E tones on 6th string slightly

RIFF B

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

RIFF C

E ------------------|------------------|------------------|------------------|
B ------------------|------------------|------------------|------------------|
G -10---------------|-9------------7---|------------------|------------------|
D -8----------------|-7------------5---|-9----------------|------------------|
A -8----------------|-7------------5---|-7----------------|-

来源：www.cifraclub.com