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 f2 e dcB A2 F D2', 'g2 e f2 d']  
X:1
L:1/8
M:6/8
K:D
 A | f2 e dcB | A2 F D2 E | F>GF FED | C<E z z2 A | f2 e dcB | A2 F D2 E | FGF{F} EDE | D3- D2 :: 
 A | g2 e f2 d | c2 A d2 f | g2 e f2 d | ce z z2 A | gfe fed | cBA def | gfe fed | (f3 e2)!D.C.! :|  