Create a fitting sequence of chord changes that enhance the given musical piece.
|: [fd]3/2 [fd]/ [fd] | [fd] [dB] [BF] | [AF] [cA] | [fe] [eA] | [AF] [cA] | 
 [fA]3/2 [fA]/ [fA] | [fA] [eA] [cA] | B [dB] | [fd] [dB] | B [dB] | [fd]3/2 [fd]/ [fd] | 
 [fd] [dB] [BF] | [AF] [cA] | [fe] [eA] | [AF] [cA] | [fA]3/2 [fA]/ [fA] | [fA] [eA] [cE] | 
 [BD] [dF] | [fA] [AE] | [BD] z z :|  
X:1
L:1/4
M:32/44
K:Bb
|:"Bb" [fd]3/2 [fd]/ [fd] | [fd] [dB] [BF] |"F7" [AF] [cA] | [fe] [eA] | [AF] [cA] | 
 [fA]3/2 [fA]/ [fA] | [fA] [eA] [cA] |"Bb" B [dB] | [fd] [dB] | B [dB] |"Bb" [fd]3/2 [fd]/ [fd] | 
 [fd] [dB] [BF] |"F7" [AF] [cA] | [fe] [eA] | [AF] [cA] | [fA]3/2 [fA]/ [fA] | [fA] [eA] [cE] | 
"Bb" [BD] [dF] |"F7" [fA] [AE] |"Bb" [BD] z z :|  