Verse
B Gm E B (round and round on this sequence)
Bridge to Chorus
F# E (X4)
Chorus
B Gm (x2)
Drop down to E
Verse and bridge and chorus as before
Mid 8
B Gm (think of it as extended chorus with a bit more pumpkins)
Mid 8 Bridge Chorus as before
Outro Chaos still on B Gm
resolves to E