Compose a piece of music that follows both the given musical theme and the letter-based structure provided.
X:1
L:1/8
M:4/4
K:Dmix
['D/D/D D>E =F<G A>d']  
X:1
L:1/8
M:4/4
K:Dmix
 A, | D/D/D D>E =F<G A>d | c>d c>A G<c E<C | D/D/D D>E =F<G A>d | c>A G<E D/D/D D>A, | 
 D/D/D D>E =F<G A>d | f<a g>e c>d e<g | a<f g>e f<d e>^c | e<^c g>e d/d/d dA | d/d/d d2 d>f a2 | 
 g<c g>e c<e g>e | d/d/d d>^c d>f a2 | g<c g>e d2 dA | d/d/d d>^c d>f a2 | g<c g>e c>d e<g | 
 a<f g>e f<d e>c | A>G c<E D/D/D D ||  