Develop a musical composition using the outlined alphabetical depiction of the structure and the provided theme.
X:1
L:1/4
Q:1/8=232
M:4/4
K:G
['B G']  
X:1
L:1/4
Q:1/8=232
M:4/4
K:G
|: B/c/ | d z c2 | B G G A/B/ | c A A f/g/ | a A A B/c/ | d z c2 | B G G g | f g d c | B G G e/f/ | 
 g d d B | g d d B | g d d B | c A A c | B d d e | e f f g | a f g c | B G G :|  