Craft a composition that integrates the assigned alphabet-related musical pattern and the provided melodic theme.
X:1
L:1/16
Q:1/8=180
M:2/4
K:none
['', 'dedB ecec', 'e2a2- abab ea2b agef']  
X:1
L:1/16
Q:1/8=180
M:2/4
K:none
[K:D]|: cd | ecec dedB | ecec ddef | gfge fafd | efge a2>g2 | edec dedB | ecec ddcd | eeaf gedB | 
 A6 :: cd | e2a2- abab | ea2b agef | gaga efga | efga gfed | e2a2- abab | ea2b agef | geag edBG | 
 A6 :|  