Construct a melodically pleasant tune that corresponds with the specified chord structure.
'Bb', 'F7', 'Eb', 'Bb', 'F7', 'Bb', 'F7', 'Bb'  
X:1
L:1/8
M:23/44
K:Bb
|:"Bb" [dB][fd] [fd][ec] | [dB]2 z2 | [dB][fd] [fd][dB] [ge][fd] |"F7" [fd]2 [ec][dB] | [cA]2 z2 | 
"Eb" [ge][ge] [ge][bg] [af][ge] |"Bb" [ge]2 [fd][ec] | [dB]2 z |"F7" [fA][fA] [fA]2 [ec]2 | 
"Bb" [dB]2 z2 z2 ::"F7" [cA][ec] [ec][dB] | [cA]2 z2 | [cA][ec] [ec][cA] [fd][ec] | 
"Bb" [dB][fd] [fd][ec] | [dB]2 z2 :|  