Here's the main bass riff(chords added in if you want a friend to strum along on guitar or something).
Dm F C
---3-------|
-5---3-3h--| (You repeat it, so you'd hammer from a C to a D here.
-----------|
-----------|
Chorus:
Repeat
-------------------|
-------------------|
-----------3-3-3-3-|
-3-3-3-1h3---------|
Then at the end of the chorus before the main riff starts up again, you go:
-----------------------------|
-0-0-0-0-0-0-0-0-0-0-0-0-0-0-|
-----------------------------|
-----------------------------|
That's pretty much it, nice and easy. It may not be 100% "accurate" in that not every
variation is covered, but it sounds fine and gets the basic idea down on paper, you can fool
around with it on your own! Sweet song!
Cheers!