Here's a pretty simple, but very cool bassline by my favorite band of all time. It's also a little tiring because of all the sliding (\), just a forewarning...for me it is anyway. I also think that a fuzz bass is being used. Only the E string is used, by the way, in case you didn't know...so enjoy :)
slide from 3rd fret up
E-8-8--8-8--8-8--8-8\11-11-11\-|
E-8-8--8-8--8-8--8-8\10-10-10\-|
E-4-4--4-4--4-4--4-4\13-13-13\-|
E-3-3--3-3--3-3--3-3\6-6-6\-| (slide to 8)
& just repeat until end