Create a musical composition using the given alphabetical pattern and melodic theme.
X:1
L:1/8
M:6/8
K:G
['', 'BGG AGE DEG AGA', 'B3 cBc']  
X:1
L:1/8
M:6/8
K:G
 A |: BGG AGE | DEG AGA | BAB cBc | dgg fdc | BGG AGE | DEG AGA | BdB cAF | AGF G2 A :: B3 cBc | 
 dgg fdc | B3 cBc | dgf g2 a | bgg age | dge dBA | GAB AGA | BGF G2 A :|  