Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/8
Q:1/4=133
M:6/8
K:D
['e f2', 'fga efe ede fed Bcd ABA AFA']  
X:1
L:1/8
Q:1/4=133
M:6/8
K:D
|: ABA AFA | d2 e f2 a | g2 e f2 d | e2 d Bcd | ABA AFA | d2 e f2 g | afd efe |1 d3 dcB :|2 
 d3 def |: g2 g gab | f2 f fga | efe ede | fed Bcd | ABA AFA | d2 e f2 g | afd efe |1 d3 def :|2 
 d3 z3 ||  