Craft a piece of music that integrates both the suggested theme and letter-based structure.
X:1
L:1/8
M:6/8
K:D
['c AGA g2 g aba efg fff', 'f2 d']  
X:1
L:1/8
M:6/8
K:D
 c | AGA g2 g | aba efg | fff ded | cAG EFG | A2 A ggg | aaa efg | efd cAG | AGA d2 :| e | 
 f2 d e2 d | ded cAG | AGA EFG | f2 d ecA | f2 d e2 d | d/e/fd B/c/de | fed cA^G | A^GA d2 :|  