Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/8
Q:1/8=140
M:2/2
K:Emin
['GA BcAB G2 FG EFGA B2 ef', 'E2 ga babg efga babg e2 fe']  
X:1
L:1/8
Q:1/8=140
M:2/2
K:Emin
 GA | BcAB G2 FG | EFGA B2 ef | gfed edBd | cBAG A2 GA | BcAB G2 FG | EFGA B2 ef | gfed Bgfg | 
 e2 E2 E2 :| ga | babg efga | babg e2 fe | d2 d^c defg | abaf d2 gf | e2 ef g2 ga | bagf e2 gf | 
 efed Bgfg | e2 E2 E2 :|  