Develop a musical composition using the outlined alphabetical depiction of the structure and the provided theme.
X:1
L:1/4
M:3/4
K:G
['D/G/ B B d/B/ c', 'B/d/ g g a/g/ f A A/B/']  
X:1
L:1/4
M:3/4
K:G
|: D/G/ B B | d/B/ c c | D/F/ A c | A B G | D/G/ B B | d/B/ c A | D/F/ A c | F G2 :: B/d/ g g | 
 a/g/ f A | A/B/ c c | e/d/ B G | B/d/ g g | a/g/ f A | A/B/ c e | d G2 :|  