This is the Riff played the entire song. It's Tabbed
 pretty good,it sounds * other tab of this
has a kinda messed up version of this.

        G            G                 Am        Am
e |-----3---------3--------3-------------------------|
B|-------3----------3------------1-------1-----1-----|
G|----------------------------------2-------2--------|
D|---------------------------------------------------|
A|----------------------------0-------0-----0--------|
E|--3-------3---------3------------------------------|

       F        F            C         C         C

e |------1-----1----- -----0--------0-------0------|
B|--------1-----1-----------1--------1-------1-----|
G|-------------------------------------------------|
D|---3------3--------------------------------------|
A|-----------------------3-------3-------3---------|
E|-------------------------------------------------|


and at the end of the riff sometimes it repeats
the end like at 00:21

        F       F                C         C
e |-------1-----1----- -----0--------0-------|
B|---------1-----1-----------1--------1------|
G|-------------------------------------------|
D----3------3--------------------------------|
A|------------------------3-------3----------|
E--------------------------------------------|