Prolouge (2525) (slowly; free tempo):
Am  G  F
E  (N.С.)

[--------
--------
--0-1-2-
--0-1-2-
--------
--------]
(^tempo becomes quicker and steadier)

Verses 1 (3535), 2 (4545), 3 (5555), & 4 (6565):
Am  G  F
E

Verse 2 (4545)
Verse 3 (5555)
Verse 4 (6565)

Link:
Am  Bbm

(key change to Bbm)

Verses 5 (7510) & 6 (8510):
Bbm  Ab  Gb
F

Verse 6 (8510)

Link: Bbm

Verse 7 (9595), 8 (2525), & 9 (3535):
Bm  A  G

(key change to Bm)
 F#

Conclusion (Now it's been 10,000 years...):
Bm  A
 (^tempo becomes slower and freeer)

G  F#  Bm
A  G
F# F#7 Bm (N.С.)

[--------
--------
--2-3-4-
--2-3-4-
--------
--------]
(^tempo becomes quicker and steadier)

Verse 8 (2525)
Verse 9 (3535), fade