Create a series of chord progressions to improve the harmonic structure of the given music piece.
FB dF Bd | f2 eg ce | FA cF Ac | g2 fb df | FB dF Bd | f2 eg ce | 
 FA cF Ac |1 B4 z2 :|2 B4 GF |]: eF ce Fe | dF Bd Fd | cF Ac FA | 
 Bd f2 gf | eF ce Fe | dF Bd Fd | cF Ac FA |1 B4 GF :|2 B4 z2 |]  
X:1
L:1/8
M:3/4
K:Bb
"Bb" FB dF Bd |"Cm" f2 eg ce |"F7" FA cF Ac |"Bb" g2 fb df | FB dF Bd |"Cm" f2 eg ce | 
"F7" FA cF Ac |1"Bb" B4 z2 :|2 B4 GF |]:"F7" eF ce Fe |"Bb" dF Bd Fd |"F7" cF Ac FA | 
"Bb" Bd f2 gf |"F7" eF ce Fe |"Bb" dF Bd Fd |"F7" cF Ac FA |1"Bb" B4 GF :|2"Bb" B4 z2 |]  