I think its just these 4 chords throughout the song, each played for 4 counts.

              A                  E                       F#m                   D
e|-------------------------2----------2------------|
B|----2--------------------2----------3------------|
G|----2--------1-----------2----------2------------|
D|----2--------2-----------4-----------------------|
A|-------------2-----------4----------X------------|
E|-----X-------------------2----------X------------|


A - E - F#m - D