RIFF1
E|-----------------------------------------------------------------------|
B|-----------------------------------------------------------------------|
G|-----------------------------------------------------------------------|
D|-----------------------------------------------------------------------|
A|-8--8-8-8--8\4--4--4/5-5\4-4/5-----------------------------------------|
E|-6--6-6-6-------2--2/3-3\2-2/3-----------------------------------------|

RIFF2
E|-----------------------------------------------------------------------|
B|-----------------------------------------------------------------------|
G|-----------------------------------------------------------------------|
D|-----------------------------------------------------------------------|
A|-4-4--4-4-4--4-4-4--4-5-5--5-4-4--4-4-4--8-8-8--8-8-8------------------|
E|-2-2--2-2-2--2-2-2--2-3-3--3-2-2--2-2-2--6-6-6--6-6-6------------------|

RIFF3
????

RIFF4
Listen to the record for the timings.
All notes a tremolo picked.
E|-----------------------------------------------------------------------|
B|-----------------------------------------------------------------------|
G|-7-9-7--3-5-3--2--4-5-(12)-(10)-9-7------------------------------------|
D|-----------------------------------------------------------------------|
A|-----------------------------------------------------------------------|
E|-----------------------------------------------------------------------|