Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/4
M:2/2
K:D
['g g g/e/f/g/']  
X:1
L:1/4
M:2/2
K:D
|: a/>g/ |"D" f a"^(Bm)" d f |"G" B _B"D" A d |"A7" c/d/e/f/ g f |"D" f/a/g/f/"A7" e a/>g/ | 
"D" f a"^(Bm)" d f |"G" B _B"D" A d |"A7" c/d/e/f/ g c |"D" d3 ::[K:A] a |"E7" g g g/e/f/g/ | 
"A" a a a b/a/ |"E7" g g g/e/f/g/ |"A" a2"B7" b3/2 a/ |"E7" g g g/e/f/g/ |"A" a e"D" f d | 
"E7" c B e G |"A" A3 :|  