Compose chord progressions that complement the given musical piece.
|: B,2 DF BdcA | BABF DB,CD | EGBE DFBD | C=EGB AFEC || 
 B,2 DF BdcA | BcdB FDEF | GBEG GFED | DCB,A, B,4 :: dBFd cAFA | 
 GEB,G FDB,D | EcBA Bdfb |1,3 gfed cA F2 :|2,4 gecA B4 :|  
X:1
L:1/8
M:2/2
K:Bb
|:"Bb" B,2 DF Bd"F7"cA |"Bb" BABF DB,CD |"Eb" EGBE"Bb" DFBD |"C7" C=EGB"F7" AFEC || 
"Bb" B,2 DF Bd"F7"cA |"Bb" BcdB FDEF |"Eb" GBEG"Bb" GFED |"F7" DCB,A,"Bb" B,4 ::"Bb" dBFd"F" cAFA | 
"Eb" GEB,G"Bb" FDB,D |"Eb" EcBA"Bb" Bdfb |1,3"Cm" gfed"F7" cA F2 :|2,4"F7" gecA"Bb" B4 :|  