Develop a musical composition by integrating the alphabetically represented musical pattern and the supplied melodic theme.
X:1
L:1/8
M:4/4
K:Emin
['B3 A', 'GEEA Bdef g2 eg fedf edBA Bdef']  
X:1
L:1/8
M:4/4
K:Emin
 B3 A BEEA | Bdef gfed | B3 A BEEF | GBAF GEEA :| Bdef g2 eg | fedf edBA | Bdef gbge | fafd e3 d | 
 Bdef gfeg | fedf efgd | B3 A BEEF | GBAF GEEA ||  