Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/16
M:6/8
K:D
['g4 g2', 'A4 z2 ag f2e2d2 cBA2g2 f2e2d2 e2A2a2']  
X:1
L:1/16
M:6/8
K:D
 A2 | d4 d2 d2e2f2 | g4 g2 g4 g2 | f2defg a2bagf | e2>d2cB A4 :: z2 ag | f2e2d2 cBA2g2 | 
 f2e2d2 e2A2a2 | f2defd ecA2g2 | fgaefd e4 a2 | b2a2g2 f2defg | fafdec d4 :|  