Riff 1
G|----------------------------------------------|
D|------------------------------3-------3-5-5---|
A|---5--5-------------------3h5---5-3-5---------|
E|---------3h5-5-5-3-1--3h5---------------------|


Fill 1
G|-------------------------|
D|-------------3-5-3-------|
A|-------3-3h5-------5-3-5-|
E|---3h5-------------------|

Riff 2
G|-----------------------------------------------|
D|--/12-12-10-12-10------------------------------|
A|------------------0-12-0-10-8-7-5--10-10h12-12-|
E|-----------------------------------------------|

G|--------------------------------------------|
D|--------------------------------------------|
A|-10-10-10-103-3-----------5-5-5-3-3-----3---|
E|------------------3-3-3-1------------3h5----|

Riff 3
G|---------------------------------------|
D|----------------/5-5-5-5-5-5--7-7-5-3--|
A|---5-5--3-3-5--------------------------|
E|---------------------------------------|

Riff 3 (variation)
G|----------------------------------------------------|
D|-----------------------3----------------------------|
A|---5-5--3-3-5------3h5---5-3------------------------|
E|---------------3h5-----------/3-3-3-3-3-3--5-5-3-1--|

Riff 4
G|-------------------------------------|
D|---------------10h12-12-10----10-12--|
A|---------10h12-------------12--------|
E|---10-10-----------------------------|

Riff 4 (variation)
G|-----------------------------|
D|-0-/12-12-10-12-10----10-12--|
A|-------------------12--------|
E|-----------------------------|

Fill 2
G|-----------------------------------------------|
D|-----------3h5-5-3---3----------5h7-7-5---5-7--|
A|-------3h5---------5--------5h7---------7------|
E|---3-3------------------5-5--------------------|

Riff 5 (end riff)
G|-------------------------------------|
D|---0-0-0-0-0-0-0-3--0-0-0-0-0-0-0-3--|
A|-------------------------------------|
E|-------------------------------------|

These riffs are played numerous times (obviously) and you should
be able to figure out where they go in the song just by listening.
They are written pretty much in chronological order so it should be
easy to get the gist of it.