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
['fed cBc ABc']  
X:1
L:1/8
Q:3/8=120
M:6/8
K:D
 A |"D" FAA"G" GBB |"D" FAd fed |"A7" cBc ABc |"D" dfe"G" dcB |"D" FAA"G" GBB |"D" FAd fed | 
"A7" cBc ABc |"D" dfe d2 :: c |"Bm" dBB fBB |"Bm" dBd fed |"A" cAA eAA | cBc edc |"Bm" dBB fBB | 
"Bm" dBd fed |"A7" cBc ABc |"D" dfe d2 :|  