Intro: 
g:-----| 
d:--1-3| 
a:3----| 
e:-----| 
 
Main: 
g:------------------| 
d:----11-3-------1-3| 
a:--3----------3----| 
e:1--------1-1------| 
 
every couple of times: 
g:------| 
d:--1-33| 
a:3-----| 
e:------| 
 
VeR-2: 
This way is much better if you have a hand that gets tired e-z-ly. 
 
Intro: 
g:-----| 
d:-----| 
a:3-6-8| 
e:-----| 
 
Main: 
g:------------------| 
d:------------------| 
a:--33-6-8-----3-6-8| 
e:1--------1-1------| 
 
every couple of times: 
g:------| 
d:------| 
a:3-6-88| 
e:------|