Riff A
E|-----------------------------------------------|
B|-----------------------------------------------|
G|-----------------------------------------------|
D|-2-2-2-2---------------------------------------|
A|-2-2-2-2----------------------3333333355555555-|
E|-0-0-0-0------0000000000000000-----------------|
  . . .        ................................

Riff B 
E|------------------------------------|
B|------------------------------------|
G|------------2-0-2-------------------|
D|-2--------3-2-0-2-3-2--------3-2----|
A|-2--------3-------3-2--------1-0-3~-|
E|---000000-------------000000--------|
    ......             ......

Riff C
EEE|---------------------------------|
BEE|---------------------------------|
GEE|---------------------------------|
DEE|---------------------------------|
|-7-7-777-7-7-777-7-7-777-7-8-7-5-|
EE|---------------------------------|
  . . ... . . ... . . ... . . . .

EE|-----------------------------------|
BE|-----------------------------------|
GE|-----------------------------------|
DE|-----------------------------------|
|-7-7-777-7-7-777-7-7-777-7-12-11-8-|
E|-----------------------------------|
  . . ... . . ... . . ... .  .  . .

EEE|---------------------------------|
BEE|---------------------------------|
GEE|---------------------------------|
DEE|---------------------------------|
|-7-7-777-7-7-777-7-7-777-7-8-7-5-|
EE|---------------------------------|
  . . ... . . ... . . ... . . . .

EEE|---------------------------------|
BEE|---------------------------------|
GEE|---------------------------------|
DEE|---------------------------------|
|-7-7-777-7-7-777-8-7-8-10-8-7----|
EE|---------------------------------|
  . . ... . . ...  

Riff D
E|----------------------------|
B|----------------------------|
G|----------------------------|
D|----------------------------|
A|---------------------8-7----|
|-000-0-0-000-0-0-etc-6-5-3~-|
  ... . . ... . .
E|--------------------------------|
B|--------------------------------|
G|--------------------------------|
D|-----------------------5-7------|
A|---------------------5-3-5--3-3-|
E|-000-0-0-000-0-0-| etc-3------1-1-|
  ... . . ... . .

Riff E
EE|---------------------------------|
EE|---------------------------------|
EE|---------------------------------|
|-2-------3-2-0-2-------------3-0-|
|-2-------3-2-0-2-------------3-0-|
|---0-0-0---------0-0-0-0-0-0-----|

Riff F
EE|---------------------------------|
EE|---------------------------------|
|----7-------5----5---------------|
|-7--7----5--5----5--7------------|
|-7--5----5--3----3--7------------|
|-5-------3----------5----0-0-0-0-|
                          . . . .

Get ready for the BRIMSTONE! :)

Riff G
E|----------------------------------------|
B|----------------------------------------|
G|-----------0-2-3-2-0-------2-0-------7--|
D|-3-2-------0-2-3-2-0---3/2-2-0-2-----7--|
A|-3-2-------------------3/2-----2-----5--|
E|-----0-0-0-----------0-----------0-0----|
      . . .           .           . .

EEE|------------------------------|
BEE|------------------------------|
GEE|------------------------------|
D|-5----5--------5----5---------|
|-3333333333333333333333333333-|
EE|------------------------------|
   .... ........ .... ........

EE|------------------------------|
EE|------------------------------|
EE|------------------------------|
|-2----2--------4----4---------|
|-0000000000000022222222222222-|
EE|------------------------------|
   .... ........ .... ........

Riff H
Just follow the bassdrum with E5 powerchords
then these two breaks
E|---------|
B|---------|
G|-7-------|
D|-7-------|
A|-5---7~--|
E|---------|

E|---------------------|
B|---------------------|
G|-7--5----------------|
D|-7--5--4-------------|
A|-5--3--2-2-2-2-2-2-2-|
E|---------------------|
          . . . . . .