Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/8
Q:1/8=300
M:2/2
K:Ador
['AB cBAB cdec d2 gd BG G2', 'cdef gfeg']  
X:1
L:1/8
Q:1/8=300
M:2/2
K:Ador
 AB | cBAB cdec | d2 gd BG G2 | cBAB cdeg | (3fgf ec A2 :| AB | cdef gfeg | fddf gfed | cdef gfeg | 
 (3fgf ec A2 A2 | (3(Bcd) ef gfeg | fddf g2 fg | (3(agf (3gfe) fdec | dfec A2 |]  