Develop a musical composition using the outlined alphabetical depiction of the structure and the provided theme.
X:1
L:1/16
M:2/4
K:G
['[Bg]2gg d2(ga b2)b2 b2a2 [Bg]2gg d2(ed', 'A2[GB]2 [EB]2BB']  
X:1
L:1/16
M:2/4
K:G
|: [Bg]2gg d2(ga | b2)b2 b2a2 | [Bg]2gg d2(ed | BA2)BB A2[GB]2 :: [EB]2BB ([EB]B)(BG) | 
 AGBG A2[GB]2 | [EB]2BB [DA]BA(G | EF)GG D2[GB]2 :|  