Create a musical composition employing the given alphabetic structure and melodic theme.
X:1
L:1/4
M:2/4
K:G
['B3/2 c/']  
X:1
L:1/4
M:2/4
K:G
 B3/2 c/ | d (d/c/) | B d | A A | B3/2 c/ | d (d/c/) | B g | B3/2 c/ | d (d/c/) | B d | A A | 
 B3/2 c/ | d({e} d/c/) | (B/d/ g) | e g | d g | e (d/c/) | B (d/B/) | A d | B (B/G/) | A d | G z | 
 e g | d g | (f/e/)({e}d/c/) | B (d/B/) | A d | B (B/G/) | A d | G z |]  