Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/8
M:6/8
K:D
['FDD EDD FAA BAA def edB', 'e faa fee fdd Bdd']  
X:1
L:1/8
M:6/8
K:D
|: A | FDD EDD | FAA BAA | def edB | AdB AFE | FDD EDD | FAA BAA | def edB | Adc d2 :: e | 
 faa fee | fdd Bdd | faa fdd | faf e2 e | faa fee | fdd Bdd | afa ede | fdc d2 :|  