Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/8
M:6/8
K:D
['BAF AFE F3 DFA', 'def d2']  
X:1
L:1/8
M:6/8
K:D
|: BAF AFE | F3 DFA | BAF AFD | FEE EFA | BAF AFE | F3 DFA | dcB AFE | FDD D2 A :: def d2 B | 
 ABA AFA | def d2 f | ede fdB | def d2 B | ABA ABc | dcB AFE | FDD D2 A :|  