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
['B ABA DFG Adf a2 g fef', 'ba=g fef dAG FDF dAG F3 FGA']  
X:1
L:1/8
M:6/8
K:D
|: B | ABA DFG | Adf a2 g | fef dAG | F3 FGA | GFG BAG | FD/E/F dcd |1 BGB g2 e | cde A2 :|2 
 ee/f/g ABc | d3- d2 |: f | a^ga ba=g | fef dAG | FDF dAG | F3 FGA | G2 G BAG | FDF d2 c |1 
 E^GB =g2 e | cde A2 :|2 efg ABc | d3- d2 ||  