Develop harmonious chord sequences that enhance the given music composition.
|: [FF]2 [G=E]2 [A_E]2 |[M:2/4] [BD]2 z [FD] | [FD]2 z2 |[M:3/4] [GE]2 [AF]2 [BG]2 | 
[M:2/4] [cA]2 z [BG] | [AF]2 z2 |[M:3/4] [ge][fd] [ec][cA] [AF][cE] | [BD]2 z2 z2 :: 
 [BD][dF] [dF][cE] [BD][dF] |[M:2/4] [fB]2 [dB]2 | [ge]2 [fd]2 | 
[M:3/4] [ec]2 [ec][cA] [GE][eA] |[M:2/4] [dB]2 [dF][cE] | [BD]2 | 
[M:3/4] [ge][fd] [ec][cA] [AF][cE] | [BD]2 z2 z2 :|  
X:1
L:1/8
M:3/4
K:Bb
|:"F7" [FF]2 [G=E]2 [A_E]2 |[M:2/4]"B" [BD]2 z [FD] | [FD]2 z2 |[M:3/4]"Eb" [GE]2 [AF]2 [BG]2 | 
[M:2/4]"F7" [cA]2 z [BG] | [AF]2 z2 |[M:3/4] [ge][fd] [ec][cA] [AF][cE] |"B" [BD]2 z2 z2 :: 
"B" [BD][dF] [dF][cE] [BD][dF] |[M:2/4] [fB]2 [dB]2 | [ge]2 [fd]2 | 
[M:3/4]"F7" [ec]2 [ec][cA] [GE][eA] |[M:2/4]"B" [dB]2 [dF][cE] | [BD]2 | 
[M:3/4] [ge][fd] [ec][cA] [AF][cE] |"B" [BD]2 z2 z2 :|  