Design a musical composition incorporating the alphabetic expression of the chosen structure and the provided melodic theme.
X:1
L:1/8
Q:1/4=70
M:3/4
K:G
['(c/B/)(A/G/) B2 g>f (e/d/)(c/B/) A>c BG{B} A>G', 'z d g>g fe a>g f>e d2']  
X:1
L:1/8
Q:1/4=70
M:3/4
K:G
"_VB" D | G2 Bd (c/B/)(A/G/) | B2 g>f (e/d/)(c/B/) | A>c BG{B} A>G | G4 z2 | G2 B>d (c/B/)(A/G/) | 
 B2 g>f (e/d/)(c/B/) | A>c BG{B} A>G | G4 z || d | g>g fe a>g | f>e d2 g>f |{f} e3 d Bd | 
 ef ga !fermata!b2 | G2 Bd (c/B/)(A/G/) | B2 g>f (e/d/)(c/B/) | A>c BG{B} A>G | G4 z |]  