Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/8
M:2/4
K:D
['DE/F/ AA AB F2- Fd BA B/d/B/A/', 'de fa- ab']  
X:1
L:1/8
M:2/4
K:D
|: DE/F/ AA | AB F2- | Fd BA | B/d/B/A/ FD | B=c/B/ AF | DE FA- | AB FE | D2 DA :: B=c/B/ AB | 
 de f2 | ed/e/ fe | ed BA | B=c/B/ AB |1 de fa- | ab fd | ef/e/ dc :|2 de fa- | ab fe | d2 dA ||  