Riff 1 
E------------------------------------------------------------- 
B------------------------------------------------------------- 
G-------0-------0------0------0-----0----------------------- 
D-------------------------------------------3s5-------------- 
A-------------------3------1--------------------------------- 
E---3-------1------------------------------------------------ 

Riff 2 
E------------------------------------------------------------- 
B------------------------------------------------------------- 
G---------0--------0----------0-------0----0--0h1p0----- 
D------------------------------------------------------------- 
A------------------------3-------1-------------------------- 
E----3--------1---------------------------------------------- 


s - slide down 
p- pull off 
h- hammer on 


Thats the whole song. Just play Riff 1 then Riff 2 over and over and over again.