Compose a music piece that includes the specified motif while adhering to the outlined alphabetical sequence.
X:1
L:1/8
M:6/8
K:Bb
['BcB dBB', 'B FDF']  
X:1
L:1/8
M:6/8
K:Bb
 F | BcB dBB | cBB dBB | BcB dBB | ecc c2 F | BcB dBB | cBB dBB | Fff f2 e | dBB B2 :: F | 
 FDF F2 B | FDF G2 B | FDF B2 d | ecc c2 F | FDF F2 B | FDF G2 B | Fff f2 e | dBB B2 :|  