Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/4
M:2/2
K:Dmin
['A d', 'a f/g/ a/g/f/g/ a b a g-']  
X:1
L:1/4
M:2/2
K:Dmin
 A | d A d e | f g/f/ e a/g/ | f/e/ d f g | a2- a :: f/g/ | a/g/f/g/ a b | a g- g d/c/ | 
 B/A/G/A/ B c | A F- F c/B/ | A/B/ c B/c/ d | c/d/ e A a | f e/d/ e ^c | d2- d :|  