Design a musical composition incorporating the alphabetic expression of the chosen structure and the provided melodic theme.
X:1
L:1/8
Q:1/8=150
M:2/2
K:Emin
['E3 F GFGA BcBA GFGA B2 E2', 'efed B3 B g2 g2']  
X:1
L:1/8
Q:1/8=150
M:2/2
K:Emin
 GF | E3 F GFGA | BcBA GFGA | B2 E2 EFGB | AGFE DEFD | E3 F GFGA | BcBA GFGA | B2 E2 AGFG | 
 E2 e2 e2 :| Bd | efed B3 B | g2 g2 B3 A | GFGA GBdB | AGFE D2 Bd | efed B3 B | g2 g2 e3 a | 
 bagf gfed | e2 e2 B3 d | efed B3 B | g2 g2 B3 A | GABd edeB | AGFE D2 GA | BABG d^cdB | 
 egfa gfgd | edcB BAGF | E2 e2 e4 |]  