Create music using the given musical theme and adhere to the outlined letter-based structure.
X:1
L:1/8
M:2/4
K:D
['fA BA', 'ed BA']  
X:1
L:1/8
M:2/4
K:D
|: fA BA | fA BA | d2 e>f | ed BA | fA BA | fA BA | d2 e>f | ed d2 :: fa f>e | ed BA | d2 e>f | 
 ed BA | fa f>e | ed BA | d2 e>f | ed d2 :|  