Create a musical composition employing the given alphabetic structure and melodic theme.
X:1
L:1/8
M:2/4
K:G
['D/D/ GG GA B2 BB/B/ AA AB', 'z2 BB BA/B/ cA AA/B/ cB ce', 'z2 BB BA/B/ cA AA/B/ cB ce', 'BB/B/ AA AA G2', 'BB/B/ AA AA G2']  
X:1
L:1/8
M:2/4
K:G
 D/D/ | GG GA | B2 BB/B/ | AA AB | G2 z2 || BB BA/B/ | cA AA/B/ | cB ce | d2 z c | BB Bc | dd de | 
 dc BA | d2 z2 |: BB BA/B/ | cA AA/B/ | cB ce | d2 z c | BB Bc | dd de | dc BA | G2 z D/D/ :| 
 GG GA | B2 BB/B/ | AA AA | G2 z d/d/ | cc cc/c/ | BB BB/B/ | AA AA | G2 z D/D/ |: GG GA | 
 B2 BB/B/ | AA AA | G2 z d/d/ | cc cc/c/ | BB BB/B/ | AA AA | G2 z :|  