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
['B2Bc A2AB', 'B2gf (ed)cB', 'd2d2d2{f}g2 d2d2d2{f}g2']  
X:1
L:1/16
M:2/4
K:G
 dc | B2Bc A2AB | G2G2G2 AB | (cB)cd (BA)Bc | A2A2 A2dc | B2Bc A2AB | G2G2 G2AB | (cB)AG (FG)AF | 
 G2G2G2 :: dc | B2gf (ed)cB | (dc)Bc A2dc | B2gf (ed)cB | A2A2A2 dc | B2gf (ed)cB | (dc)Bc A2dc | 
 BdcB AcBA | G2G2G2 :: Bc | d2d2d2{f}g2 | d2d2d2{f}g2 | d2d2 edcB | dcBc A2Bc | d2d2d2{f}g2 | 
 d2d2d2{f}g2 | (dc)Bd (dc)BA | G2G2G2 :|  