PART 1: To get that drone like sound, repeatedly pluck the open D string:
e|--------------------------|
B|--------------------------|
G|--------------------------|
D|-0-0-0-0-0-0-0-0-etc...---|
A|--------------------------|
E|--------------------------|
PART 2: Guitar riff playing under vocals:
Riff 1:
e|-------------------------------------------------|
B|-------------------------------------------------|
G|-11-11s12--9-9s11--11----------------------------|
D|----------------------12-10-10h12p10--5-5h7--5---|
A|-------------------------------------------------|
E|-------------------------------------------------|
Riff 2:
e|-----------------------|-------------------|
B|-----------------------|-------------------|
G|-----------------------|-------------------|
D|-5-5h7-5-5-/10\5-/10\5-|-5-5h7-5-5-7-5-7-5-|
A|-----------------------|-------------------|
E|-----------------------|-------------------|
PART 3: Final guitar riff after brief interlude:
e|---------7--7---------------------|
B|-7-7---7-------8--/10--8-10-9-8---|
G|----------------------------------|
D|----------------------------------|
A|----------------------------------|
E|----------------------------------|
| / slide up
| \ slide down
| h hammer-on
| p pull-off
| s slide to
PLAY TOO ..