Produce music using the specified musical structure depicted in letters along with the provided musical theme.
X:1
L:1/8
M:6/8
K:Dmix
['FGA GFD', 'cEG EFG cAG']  
X:1
L:1/8
M:6/8
K:Dmix
|: [DA]dB c c/c/c | FGA GFD | AdB ccD | fga gfd | AdB cc/c/c | FGA GFD | cE/F/G BAG | 
 AFD D D/E/D :: Ec/c/c cEG | EFG cAG | [DA]d/d/d ded | cAB c/B/AG | Ecc cEG | EFG cAG | 
 cE/F/G BAG | AFD DD/E/D :|  