This is what the guitar plays at the beginning.
Here it is:
||--------------------------------2x-----------------------------||
e:||------------------|------------------|-------------------------||
B:||-14-14-14-14------|-14-14-14-14-12---|-------------------------||
G:||-------------14---|------------------|-14-14-14-14-----14------||
D:||------------------|------------------|-------------14-----12---||
A:||------------------|------------------|-------------------------||
E:||------------------|------------------|-------------------------||
For speed and timing listen to the song.