Pretty sure the riff for the whole song is as follows:

  C                Bb               F                      D     D#
G|----------------|----------------|----------------|----------------|
D|----------------|----------------|----------------|3-3-3-0-0-0-1-1-|
A|3-3-3-3-3-3-3-3-|1-1-1-1-1-1-1-1-|----------------|----------------|
E|----------------|----------------|1-1-1-1-1-1-1-1-|----------------|
  1 + 2 + 3 + 4 + |1 + 2 + 3 + 4 + |1 + 2 + 3 + 4 + |1 + 2 + 3 + 4 + |

End on C