E|-------------------------------------------------------------------------|
B|-8~-9~~~-----------------------------------------------------------------|
G|-------------------------------------------------------------------------|
D|-------------------------------------------------------------------------|
A|-------------------------------------------------------------------------|
E|-------------------------------------------------------------------------|
After playing that a few times the pace picks up

E|-------------------------------------------------------------------------|
B|-8-888-888-8-8-9~~~------------------------------------------------------|
G|-------------------------------------------------------------------------|
D|-------------------------------------------------------------------------|
A|-------------------------------------------------------------------------|
E|-------------------------------------------------------------------------|
and there's this slight variation(11 is eleventh fret)

E|-------------------------------------------------------------------------|
B|-8-888-888-8-8-99-11-9---------------------------------------------------|
G|-------------------------------------------------------------------------|
D|-------------------------------------------------------------------------|
A|-------------------------------------------------------------------------|
E|-------------------------------------------------------------------------|
The other part(you could play it on the b string of course)

E|-10~-8~-7~-787-6~-676----------------------------------------------------|
B|-------------------------------------------------------------------------|
G|-------------------------------------------------------------------------|
D|-------------------------------------------------------------------------|
A|-------------------------------------------------------------------------|
E|-------------------------------------------------------------------------|
and the most striking variation of that 

E|-10~-8~-7~-787-6~-10-8-6-7-----------------------------------------------|
B|-------------------------------------------------------------------------|
G|-------------------------------------------------------------------------|
D|-------------------------------------------------------------------------|
A|-------------------------------------------------------------------------|
E|-------------------------------------------------------------------------|
Towards the end,the basic part is moved higher

E|-15-151515-151515-15-15-16~~~--------------------------------------------|
B|-------------------------------------------------------------------------|
G|-------------------------------------------------------------------------|
D|-------------------------------------------------------------------------|
A|-------------------------------------------------------------------------|
E|-------------------------------------------------------------------------|