Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/8
M:2/2
K:D
['F)DAD BGAF', 'dfeg fdec']  
X:1
L:1/8
M:2/2
K:D
 (G | F)DAD BGAF | E=cGc E=CC(G | F)DAD BGAF | Adce dD D :| A | defd gfed | BdAF E=CCe | 
 dfeg fdec | dBAG FDDe | dfeg fdec | BdAF E=CCA | dfeg face | dBAG FD D ||  