This bassline is interesting cuz it's constantly moving & the pattern changes somewhat unexpectedly, but once you learn it, it comes along alot easier. The pattern may be hard to follow, so just learn the figures first, then listen to the song a few times, & then try & fit in the patterns. I hope I have all the strokes right, there might be a couple more strokes missing, but all the notes should be right.
figure 1--play 4 times during the intro
G------------------|---------------------|-----------------|-----------------|
D------------------|---------------------|-----------------|-----------------|
A-5--5-5-5-5--5/-|-7-7--7/8-8/10-10\-|-3--3-3-3-3--3-|-1-1--1---------|
E------------------|---------------------|-----------------|---------1-1-3-3-|
figure 2--play 3 times during the 1st verse
D------------------|---------------------|-----------------|---------------|
A-5--5-5-5-5--5/-|-7-7--7/8-8/10-10\-|-----------------|---------------|
E------------------|---------------------|-5--5-5-5-5--5/-|7-7--7-8-8--8-|
figure 3
D-----------------|----------------|-----------------|------------------|
A-5--5-5-5-5--5-|3-3--3-1-1--1-|-7--7-7-7-7--7-|-8-8--8---------|
E-----------------|----------------|-----------------|---------8-8--8-|
figure 4-repeat 4 times
A---------------------3-3-2-2-|-----------------------------|
D------------------------------|-0--0-0-0-0-0-0-0-3-3-----|
E-1--1-1-1-1--1-1-1----------|------------------------3-3-|
figure 5-play in replace of 2nd measure of figure 4 on 4th repeat only
A----------3-3-2-2-|
D-------------------|
E-3-3--3-----------|
back to figure 2 -- 3 times
figure 4 -- 4 times
figure 2
figure 4
repeat figure 1 until end