d------------------------------------------------|
a------------------------------------------------|
f------------------------------------------------|
c-----3---0------3---0---------------------------|
g---0---0------0---0-----------------------------|
C-0----------0-----------------------------------|
[ Tab from: http://www.guitaretab.com/h/horse-the-band/89727.html ]
d------------------------------------------------|
a------------------------------------------------|
f-----2-----2-----2-----2------------0-----------|
c--------------------------------------2---------|
g-0-3---0-3---0-3---0-3------0-3-0-2-----2-------|
C--------------------------2---------------------|
d------------------------------------------------|
a------------------------------------------------|
f-----------0------------------------------------|
c-------------2--------0-----0-------------------|
g---0-3-0-2-----2----0-----0-------0-----0---0---|
C-2----------------5-----5-----5-5---5-3---2---0-|
This riff is repeated for the whole instrumental.