By Daff

riff 1
e-------------------------------------------|
b-------------------------------------------|
G-----------------------------------------9-|
D-----------------------------------------9-|
A---1h2-1h2-------1h2-1h2-------1h2-1h2---7-|
E-0---------0---0---------0---0---------0---|

riff 2
e-------------|
b----------2--|
G----------2--|
D--0-0-----2--|
A-0-0-1-0-----|
E-------------|

riff 3
e--------------------|
b--------------------|
G--------------------|
D--11111111----------|
A-----------44444444-|
E--------------------|

you should be able to work out the timing and stuff from that.