Compose a piece of music that follows both the given musical theme and the letter-based structure provided.
X:1
L:1/8
M:3/4
K:A
['A,>C EA ce a>g fe dc cB/c/', 'a>g fA df a>f eA ce f>e', 'E>G BE GB AA/c/ eA ce d>c']  
X:1
L:1/8
M:3/4
K:A
 A,>C EA ce | a>g fe dc | cB/c/ dE GB | BA/B/ cA E/F/E | A,>C EA ce | a>g fe dc | cB/c/ dE GB | 
 BA/G/ A4 :: a>g fA df | a>f eA ce | f>e dE GB | AA/c/ ec/e/ a2 | a>g fA df | a>f eA ce | 
 f>e dE GB | BA/G/ A4 :: E>G BE GB | AA/c/ eA ce | d>c df af | fe/d/ e4 | E>G BE GB | AA/c/ eA ce | 
 d>c Be gb | ba/g/ a4 :|  