Construct a melodic piece using the alphabet-based musical sequence and the given motif.
X:1
L:1/8
M:6/8
K:Bb
['BcB FDF', 'B2 Fdb fdB egB AGF Egg Dff']  
X:1
L:1/8
M:6/8
K:Bb
 BcB FDF | BdB cec | BcB FDF | GeA B2 :: Fdb fdB | egB AGF | Egg Dff | ecA B3 :|  