Craft a composition that integrates the assigned alphabet-related musical pattern and the provided melodic theme.
X:1
L:1/4
Q:1/4=120
M:3/4
K:C
['', 'G c', 'B G']  
X:1
L:1/4
Q:1/4=120
M:3/4
K:C
|: |: G | c G E | C3/2 D/ E | F A d | B G G | c G E | F3/2 G/ A | G c B | c2 :| c/d/ | e c e | 
 d B G | A A/B/ c/e/ | B G G | e c e | d B G | c B A | G2 A/B/ | c G E | C3/2 D/ E | F A d | 
 B G G | c G E | F3/2 G/ A | G c B | c2 ||  