E|-----------------7-7----------------------------7-7-5-5-------------|
B|--7--0--7-7-0-7------10-10-------------7-7-0-7----------5-5-7-------| 1st riff
G|---------------------------9-9-11--7-0-------------------------7-0--|
D|--------------------------------------------------------------------|
A|--------------------------------------------------------------------|
E|--------------------------------------------------------------------|

E|----------7-7----------------------------7-7-5-5--------------------|
B|-7-7-0-7------10-10-------------7-7-0-7----------5-5-7--------------| 2nd riff
G|--------------------9-9-11--7-0-------------------------7-0---------|
D|--------------------------------------------------------------------| (play as
A|--------------------------------------------------------------------| many times
E|--------------------------------------------------------------------| as needed)

I understand it may not be completely accurate, but it does sound
just about right and works nicely when playing along to the song
or playing with a bassist. A great song, enjoy!