Compose a piece of music that follows both the given musical theme and the letter-based structure provided.
X:1
L:1/8
M:6/8
K:D
['A dcB cBA BAF A2 F GFG', 'dAd edA']  
X:1
L:1/8
M:6/8
K:D
 A | dcB cBA | BAF A2 F | GFG =cGE | DED D2 A | dcB cBA | BAF A2 F | GFG =cGE | DED D2 :| A | 
 dAd edA | dAd edA | G3 =cGE | GAB =cde | dAd edA | dAd edA | G3 =cGE | DED D2 :|  