Afraid I don't know the intro riff but here is the main chord sequence for the rock bit.




-------------------------------------------------------------------------------------
-------------------------------------------------------------------------------------
--------------------------------------7---5------------------------------------------
------7---7---5---7---5---7---5---5---7---5-------7---7---5---7---5---3---3---3---5--
------7---7---5---7---5---7---5---5---5---3-------7---7---5---7---5---3---3---3---5--
------5---5---3---5---3---5---3---3---------------5---5---3---5---3---1---1---1---3--
                                                        
x2                                                         
                                                          
                                                           
                                                                 
----------------------------------------------------------------------------------------
----------------------------------------------------------------------------------------
---------------------------------------12-10--------------------------------------------
------12--12--10--12--10--12--10--10---12-10------12--12--10--12--10--8---8---8---10----
------12--12--10--12--10--12--10--10---10--8------12--12--10--12--10--8---8---8---10----
------10--10---8--10---8--10---8---8--------------10--10---8--10---8--6---6---6----8----

x2

Just keep moving up the fret board as much as you like: