Develop a piece of music conforming to the stated structure and theme.
X:1
L:1/4
M:2/2
K:D
['d2 e2 f', 'd2 e2 f'  
X:1
L:1/4
M:2/2
K:D
 d2 e2 | f e/d/ c A | d2 e2 | f e/f/ d2 :: f2 g2 | a a e e | f f g g | b b a2 | d2 e2 | 
 f e/d/ c A | d2 e2 | f e/f/ d2 :|  