#2
It sounds like these two riffs repeated:

e|---------------------------------|
B|-----5-------5-------5-------5---|
G|---5---5---5---5---5---5---5---5-|
D|-7-------5-------4-------3-------|
A|---------------------------------|
E|---------------------------------|

e|-------------------------------------|
B|-------------------------5-------7---|
G|-12-12-----12-12-------5---5---7---7-|
D|-12-12-----12-12-----5-------7-------|
A|-10-10-----10-10---------------------|
E|-------------------------------------|