Develop a musical composition using the outlined alphabetical depiction of the structure and the provided theme.
X:1
L:1/8
M:3/4
K:G
['(G>A) B2 B2 A B (e2 d2){c}', '(g/a/b/a/) g2 e2 B d e2 (g>B){B}']  
X:1
L:1/8
M:3/4
K:G
 (G>A) | B2 B2 A B | (e2 d2){c} B (A/G/) | d2 d2 e f | g4 f2 | e2 d2 B d | e2 (gB){B} A (G/E/) | 
 G2 G2 A3/2 B/ |{B} d4 |: (g/a/b/a/) | g2 e2 B d | e2 (g>B){B} A (G/E/) | G2 G2 A3/2 B/ | d4 :|  