Develop a musical composition using the outlined alphabetical depiction of the structure and the provided theme.
X:1
L:1/8
M:4/4
K:A
['EG BdBG e2', '=c=cB BAA=G =G=F=FE', 'Bcd e2 cd ecde f2 de fdef']  
X:1
L:1/8
M:4/4
K:A
|: EAc | BAGA BAGF | G2 EG BdBG | e2 EG BdBG | e2 c3 EAc | BAGA BAG=G | F2 DF AdcB | ecAc dBGE | 
 A2 AG A :: =c=cB | BAA=G =G=F=FE | E3 G BEGB | E2 EG BEGB | =c2 A3 =c=cB | BAA=G =G=F=FE | 
 D3 E =F=GAB | =cAE=c BGEG | A2 AG A :: Bcd | e2 cd ecde | f2 de fdef | g2 ef gefg | 
 a2 c' c'2 Bcd | e2 cd ecde | f2 de fdef | g2 ga gefg | aece A :|  