Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/8
M:4/4
K:C
['(C2 C>)E G<G', 'g>ag>e g<c c>e']  
X:1
L:1/8
M:4/4
K:C
 (C2 C>)E G<G c>A | G>Ac>d e<c c<e | (C2 C>)E G<G c>e | (3fed (3edc B<d d<e | (C2 C>)E G<G c>A | 
 G>Ac>d e<c c<e | f<a d<f e<g c<e | d>e f/e/d/c/ B<d d<e :: g>ag>e g<c c>e | g>ag>e (3efg (3fga | 
 g>ag>e g<c c>e | (3fed (3edc B<d d>e | g>ag>e g<c c>e | g>ag>e (3efg (3fga | 
 (3gfe (3fed (3edc G>c | d>e f/e/d/c/ B<d d<e :|  