Just before the E and F# chords, play this riff:
E|--0h2-0----|
B|--------3--|
G|-----------|
D|-----------|
A|-----------|
E|-----------|

[Intro]
|Bm       |Bm       |
|Bm       |E        |D        |F#       |

(Each chord is worth 1 beat)
   Bm/E  Daug D/A   E9  Dadd4      A
E|---2----2----2----2----2----2----0----0---|
B|---3----3----3----3----3----3----2----2---|
G|---4----3----2----1----0----0----2----2---|
D|---4----0----0----2----0----0----2----2---|
A|---2---------0-------------------0----2---|
E|---0--------------------------------------|

|Bm A G A |Bm A G A |Bm A G A|Bm A G A |


Riff played over above refrain (with tape echo / delay):

E|-----------------|
B|-----------------|
G|-----------------|
D|--------0--------|
A|--0-0-2---2------|
E|-----------------|

E|--------------|
B|--------------|
G|--------------|
D|-0------------|
A|---2-0-2------|
E|--------------|

|Bm       |E        |D       |F#       |

(Each chord is worth 1 beat)
   Bm/E  Daug D/A   E9  Dadd4      A
E|---2----2----2----2----2----2----0----0---|
B|---3----3----3----3----3----3----2----2---|
G|---4----3----2----1----0----0----2----2---|
D|---4----0----0----2----0----0----2----2---|
A|---2---------0-------------------0----2---|
E|---0--------------------------------------|

|Bm A G A |Bm A G A |Bm A G A|Bm A G A |


Riff played over above refrain:

E|------------------|
B|------------------|
G|------------------|
D|--------0---------| x3
A|--0-0-2---2-0---0-|
E|--------------3---|

E|---------------|
B|---------------|
G|---------------|
D|-0-------------|
A|---2-0-2-0---0-|
E|-----------3---|