This is heard alone in the intro and outro but also throughout the song.

e|-8-6-4---1~---4--13-11-10--------------|
b|-------4---4-------------11----8-9-----|
g|----------------------------10---------|
d|---------------------------------------|
a|---------------------------------------|
e|---------------------------------------|

Note: I know this is not exact, but this is my way of playing it. If you play it along 
the track it sounds good.