Tuning: B Standard
Legend:
b - bend
r - release
v - vibrato
h - hammer-on
p - pulloff
/ - slide up
\ - slide down
Main Riff 1
D|--------------|-----------|----------|---------|
A|--------------|-----------|----------|-5-------|
E|------5-7-5---|-----------|---5-7-5--|---------|
B|-0--0-------6-|-0-3-5-3-0-|-0-------6|---5-6-7-|

Main Riff 2
D|--------------|-----------|-----------|----------|
A|--------------|-----------|-----------|----------|
E|------5-7-5---|-----------|-----------|----------|
B|-0--0-------6-|-0-3-5-3-6-|-0-3-5-3-0-|-00-3-2-1-|

Riff 3
D|------------------------------------------------|
A|------------------------------------------------|
E|-----5h7-7--------5h7-7-----5h7-5---------------|
B|-0-0-------0--0-0-------0-0-------6-6--0-3-5-3--|

Fast Riff 1
D|--------------------------|
A|--------------------------|
E|---------5----------------|
B|-7-7-5-7---7-7p0-6-6-5-3--|

Fast Riff 2
D|--------------------------|
A|---------5----------------|
E|-7-7-5-7------------------|
B|-----------7-7p0-6-6-5-3--|

End
D|---|
A|---|
E|-7-|
B|-0-|
For the song scheme, just listen to it. It's easy, just like every stoner doom song :)
Play with lots of fuzz, thin and loose strings, and bend some notes whenever you feel 
it. Lots of feedback is a must!
Enjoy!