Compose a piece of music that follows both the given musical theme and the letter-based structure provided.
X:1
L:1/8
M:2/2
K:A
['', 'e>f |{a} g>fg>e', 'G>A B>cB>A (TG>E)E>D E>AA>G A>cB>A G>AB>c d2']  
X:1
L:1/8
M:2/2
K:A
 A>G |: E>AA>G A>cB>A | G>AB>c d2 e>f |{a} g>fg>e |1,3 d>BB>d | c>AB>G (TG>E)E>D :|1,2 e>dB>G | 
 A2 A>A A2 :: e>f |{a} g>fg>e a>ga>e | g>fg>e d>BB>d | c2 c>B A2 G>A | B>cB>A (TG>E)E>D || 
 E>AA>G A>cB>A | G>AB>c d2 e>f |{a} g>fg>e e>dB>G | A2 A>A A2 :|  