Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/8
M:6/8
K:Dmix
['A2 G FDE F2', 'G3 Add fed cAB', '', 'G FDE F2', 'fdd =cAB']  
X:1
L:1/8
M:6/8
K:Dmix
 ABG A2 G | FDE F2 d | cAA BAG | Ade fed | cAG A2 G | FDE F2 G | Add fdd | ecA G3 :: Add fed | 
 cAB cAG | Add fdd | ecA G3 | Add fed | cAB cde | fag efd | cAF G3 :|"^variations" |: ABA A2 G | 
 FDE F2 d | ^cAA BAG | Ade fed | ^cAG A2 G | FDE F2 G | Add fed | e^cA G3 :: Add fdd | =cAB cAG | 
 Ade fdd | e^cA G3 | A2 d fdd | =cAB cde | fag e^cA | AGF G3 :|  