Boom Boom Guitar Riff

These are the tabs for the bass/guitar riff or whatever you want to call it. The little parts between brackets are optional, but it sounds very nice and it connects the seperate bass lines with each other. Enjoy!
Here is the link to the original song:
http://www.youtube.com/watch?v=1_RUY657KYQ
-6 -7 -8 ~ -6 6 5 -4 5
(5 6 -6 5)
5 6 -7 -6 6 5 -4 5
(5 6 -6 5)
-6 -7 -8 ~ -6 6 5 6 -6
(-6 -6 6 -6)
-6 -7 -8 ~ -6 6 5 -4 5
(5 6 -6 5)
-6 -7 -8 ~ -6 6 5 6 -7
(-7 -7 -6 -7)
-3 -4’ 5 6 6 5v…