Design a musical composition incorporating the alphabetic expression of the chosen structure and the provided melodic theme.
X:1
L:1/8
M:4/4
K:Emin
['GFGA BE E2 BAB=c dA A2', 'fd d2']  
X:1
L:1/8
M:4/4
K:Emin
|: E3 F GFGA | BE E2 BAB=c | dA A2 defg | agfg e2 dB | GBEF GFGA | BE E2 BAB=c | dA A2 B2 AF | 
 GAFG E2 ED :: G3 B d2 eg | fd d2 faba | g3 f gedg | eBdB ABBA | G3 A Bdge | fd d2 a2 ga | 
 bg g2 agfg | effe b2 z2 :|  