std tuning 
 It sounds like its a repetition of the same riff all the way through the song and although it sounds simple it is a wee bit awkward to finger. I used my index finger to fret the 3 notes at the 12th fret


G |———————12————————|———————12————————|—————————————————|—————————————————|
D |—12—14———————————|—12—14———————————|—and keep—repeating————————————————|
A |——————————12—12——|——————————12—12——|—————————————————|—————————————————|
E |—————————————————|—————————————————|—————————————————|—————————————————|
    1 & 2 & 3 & 4 &   1 & 2 & 3 & 4 &   1 & 2 & 3 & 4 &   1 & 2 & 3 & 4 &