Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/16
Q:1/8=120
M:3/8
K:D
['(3(ABc) d2d2d2 d4 Ad f2f2f2 f4 df', '(fa) (ag)g2']  
X:1
L:1/16
Q:1/8=120
M:3/8
K:D
 (3(ABc) | d2d2d2 | d4 Ad | f2f2f2 | f4 df | a4 fd | b4 ge | c2cdec | d4 :: (fa) | (ag)g2 (ec) | 
 (ed)d2 (fa) | (ag)g2a2 | a4 (fa) | (ag)g2 (ed) | edd2 a2 | babgec | d4 :|  