E|-------------------------------| I--------------------------------|I
B|-------6-----------------------| I--------------------------------|I
G|---6-------6-----------6-------| I-------4---3-----------4---3----|I
D|-----6-------6-----7-------7---| I---4---------4-----4---------4--|I
A|-4-------------------7-------7-| I-----4---------------4----------|I
E|-----------------5-------------| I-2---------------2--------------|I

During the chorus, the chords are

C# A5 F# F#
(all power chords; one repetition of all four takes the same amount of time as one play-through of the 
riff)