Create a musical composition employing the given alphabetic structure and melodic theme.
X:1
L:1/8
Q:3/8=88
M:6/8
K:C
['Gcc Bcc _B B2- B3 F_AA FAA']  
X:1
L:1/8
Q:3/8=88
M:6/8
K:C
 Gcc Bcc | _B B2- B3 | F_AA FAA | G G2- G2 z | Gcc ccc | ccB BAA | G2 F- F3 | F_BB ABB | 
 _A2 G- G3- | G2 z4 ||  