Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/8
M:6/8
K:G
['AGE FGA']  
X:1
L:1/8
M:6/8
K:G
|: A |"G" B3"C" AGE |"G" DGG"D" FGA |"G" B3"C" cBc |"D" def"G" g2 d/c/ |"G" B3"C" AGE | 
"G" DGG"D" FGA |"G" Bcd"C" cAF |"D" AGF"G" G2 :: A |"Bm" B3"C" cBc |"D" def"Em" g2 d |"C" def g3 | 
"A" abg fed |"G" dgg bgg |"A" a2 g"D" fed |"G" Bcd"C" cAF |"D" G3"G" G2 :|  