Craft a composition that integrates the assigned alphabet-related musical pattern and the provided melodic theme.
X:1
L:1/4
M:4/4
K:C
['G, C C G, G, E, G,/E,/']  
X:1
L:1/4
M:4/4
K:C
 G, | C C G, G, | E, G,/E,/ C, G, | C C G, G, | E, G,/E,/ C, G, | D D G,/G,/G,/G,/ | E E E/D/ G, | 
 D D D/D/ G, | E D C |]  