These are just a couple ways to play the intro on the guitar.
[ Tab from: http://www.guitaretab.com/a/athlete/380722.html ]
e|--0--------3--1--0--0--------3--1--0--0--------3--1--0----------|
B|-----3--1--------------3--1--------------3--1-----------1-------|
G|----------------------------------------------------------------|
D|----------------------------------------------------------------|
A|----------------------------------------------------------------|
E|----------------------------------------------------------------|
OR...
e|------------3--1--0------------3--1--0------------3--1--0-------|
B|---5--3--1--3---------5--3--1--3---------5--3--1--3--------1----|
G|---5-----0------------5-----0------------5-----0-----------0----|
D|----------------------------------------------------------------|
A|----------------------------------------------------------------|
E|----------------------------------------------------------------|