My first tab after playing bass nearly a year and a half. The ordering isn't hard to 
work out. Some of the timing might be out, but it isn't hard to work out when you're 
playing it.

Riff 1:
G|-----------------------------------------------------------------------------|
D|-----------------------------------------------------------------------------|
A|-----------------------------------------------------------------------------|
E|3-2-0000000000003-2-0000000000003-2-0000000000003-2-000000000000-------------|

Riff 2:
G|-----------------------------------------------------------------------------|
D|-----------------------------------------------------------------------------|
A|-----------------------------------------------------------------------------|
E|0--33--22--11---0-33-22-11---0--33--22--11---0--33-22-11---------------------|

These riffs alternate through the song. Enjoy!