Riff 1, tremolo picking,
E|-------------------|
B|-10----------------|
G|-9-------10-10-9---|
D|-7-------10--------|
A|-7-------8---------|
E|-------------------|

Riff 2, first time "normal" picking, then tremolo,
E|---------------------------------------------------------------------|
B|---------------------------------------------------------------------|
G|---9----------------------7---------9-----7----------------7-9-10-9--|
D|-7---109-7-109-7---109-10---109-6-7---109---109-7---109-10-----------|
A|-----------------8--------------------------------8------------------|
E|---------------------------------------------------------------------|

Riff 3, tremolo picking, it's almost the same as Riff2 played an octave lower
play it once and go back to Riff2
E|-----------------------------------------------------------------|
B|-----------------------------------------------------------------|
G|-----------------------------------------------------------------|
D|---2---------------------0---------2-----0---------------0-2-3-5-|
A|-0---3-2-0-3-2-0---3-2-3---3-2---0---3-2---3-2-0---3-2-3---------|
E|-----------------1-------------4-----------------1---------------|


Riff 4, tremolo picking, listen for timing, notes in brackets () - play one
of them, or both, it sounds good anyway
E|---------------------------------------------|
B|---------------------------------------------|
G|---------------------------------------------|
D|-7---9-109-7---109-10-(7)--109-10-6---7-9-10-|
A|----------------------(8)--------------------|
E|---------------------------------------------|

Riff 5, tremolo picking, watch out for timing,
notes in brackets () - like in Riff 4
E|-----------------|
B|-----------------|
G|-----------------|
D|-7------(7)--9-6-|
A|--------(8)------|
E|-----------------|