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
['d2 c B2 A F2 A DEF', 'A,3 D3 FEF FEF GFG GFG']  
X:1
L:1/8
M:6/8
K:D
 d2 c B2 A | F2 A DEF | G2 G GFG | BAG ABA | d2 c B2 A | F2 A DEF | G2 G ABc | dAF D3 :| A,3 D3 | 
 FEF FEF | GFG GFG | BAG ABA | A,3 D3 | FEF FEF | GFG GFG | BGE D3 :|  