Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/8
Q:3/8=120
M:6/8
K:D
['f ecA', 'd2 f ecA acA']  
X:1
L:1/8
Q:3/8=120
M:6/8
K:D
 f | ecA def | ecA d2 f | ecA ecA | BcB d2 f | ecA def | ecA d2 f | faf edc | BcB d2 :: f | 
 ecA acA | ecA d2 f | ecA acA | BcB d2 f | ecA acA | ecA d2"^NB" f | faf edc | BcB d2 f :|  