you can keep your bass in standard E tuning and idk the other guy on here might be right
drop B tuning but it sounds the same if you play it this way too so
G------------------------------| That goes on and repeats for a little while
D------------------------------|
A--11--11----222--11--11---444-|
E---------444-----------222----|
[ Tab from: http://www.guitaretab.com/r/red/207890.html ]
Verse
all these are triplets played into one another
G------------------------- ------------------------|
D------------------------- ------------------------|
A 111111111111111111111111 444444444444444444444444|
E------------------------- ------------------------|
------------------------- ------------------------|
------------------------- ------------------------|
------------------------- ------------------------|
2222222222222222222222222 111111111111111111111111|
and that is basically the whole song