Create a musical composition employing the given alphabetic structure and melodic theme.
X:1
L:1/8
M:4/4
K:G
['g2 (3efg fe']  
X:1
L:1/8
M:4/4
K:G
 G3 A Bg g2 | bg g2 egdB | G3 A BG G2 | ABAG EGDE | G3 A Bg g2 | bgag (3efg dB | G2 GA BAGE | 
 ABAG ED Bd | g2 (3efg fe Bd | g2 ef gaba | g2 (3efg fe Bd | egfd e2 ef | g2 (3efg fe Bf | 
 e2 Be gaba | g2 ge be ge | dgbg egdB |]  