Craft a composition that integrates the assigned alphabet-related musical pattern and the provided melodic theme.
X:1
L:1/8
M:4/4
K:C
['G2 DE GABd dBeB dBAB GEDE GBeB', 'g2 bg']  
X:1
L:1/8
M:4/4
K:C
|: G2 DE GABd | dBeB dBAB | GEDE GBeB |1 dBAc BEEF :|2 dBAc BEE || g3 g fedA | Beed Beef | 
 g2 bg fedB | dBAc BEEf | g2 ag fedA | Beed e3 f | g2 bg faaf | dBAd BEEF ||  