E|12------11..-----------------|
B|--11--13---------------------|
G|----12-----------------------|
D|-----------------------------|
A|-----------------------------|
E|-----------------------------|

Riff 2

E|-----------------------------|
B|-----------------------------|
G|-----------------------------|
D|-3.--------------------------|
A|-3.-2.-1.-2.-3.--------------|
E|----2.-1.-2.-3.--------------|

Riff 3

E|-----------------------------|
B|-----------------------------|
G|-----------------------------|
D|-----------------------------|
A|------1-2^-------------------|
E|3-1-1------------------------|

Riff 4

         /---\
E|-----------------------------|
B|--------------(str| um hard)---|
G|-----------------------------|
D|--4h5p5-6--------2-----------|
A|---------5-------2-3-1-------|
E|----------6--------3-1-------|

and that's the whole "song". :)

it goes:
riff 1 x4
riff 2 x2 or x4
riff 3 x2
riff 2 x2 or x4
riff 3 x2
riff 4