Compose a piece of music using the provided motif and follow the designated alphabet character structure.
X:1
L:1/8
M:9/8
K:Bmin
['ecA def']  
X:1
L:1/8
M:9/8
K:Bmin
"Bm" def BdB BBB |"Bm" def BdB"A" ecA |"Bm" def BdB Bcd |"A" cBA Aaf ecA ::"D" def a2 f a2 f | 
"D" def a2 f"A" ecA |"D" def a2 f"A" ecA |"A" cBA Aaf ecA :|  