Craft a composition that integrates the assigned alphabet-related musical pattern and the provided melodic theme.
X:1
L:1/8
M:2/2
K:C
['ec c2 GE E2', 'ecgc acgc']  
X:1
L:1/8
M:2/2
K:C
 f | ec c2 GE E2 | Dddc d2 df | ec c2 GE E2 | CccB c3 :: f | ecgc acgc | Dddc d2 df | ecgc acgc | 
 GccB c2 df | ecgc acgc | Dddc d2 df | egcg fadf | GccB c3 :|  