Its just one riff all the way through, again and again:

P=pop (you have to pop with three fingers on different strings in this song)

     P      P  P  P    P                  P      P P    P P
:----7------7--9--7----6-----7--6--4------4------4-6-----------------------:
:----9------9----------7-------------5----5------5-6----4-4-4-5-4-2-4-2----:
:----9------9----------7------------------5------5-7----4-4-------------5-4:
:0-7----0-7----------5---0-5------------3-----0-3----0-2-------------------:


I'm pretty sure that's perfect.