Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/4
M:3/4
K:C
['g g', 'd d']  
X:1
L:1/4
M:3/4
K:C
 G | c/B/c/d/e/f/ | g g e | a a f | g g e | c/B/c/d/e/f/ | g g g | a/b/c'/b/c'/a/ | g2 :| e | 
 f a f | e g e | d d d | e c e | f a f | e g e | d d d | c2 :|  