Develop a musical composition using the outlined alphabetical depiction of the structure and the provided theme.
X:1
L:1/8
M:6/8
K:G
['d2 B', 'G2 [B,F]/[CE]/ D2 E [CE]2 D [B,B]DG']  
X:1
L:1/8
M:6/8
K:G
|: B/c/ | d^cd edc | d2 B G2 B | A2 F DBc | B2 G D2 B/c/ | dGd edG | d2 B G3 | A2 F D2 F | G3 G2 :: 
 [B,F]/[CE]/ | D2 E [CE]2 D | [B,B]DG B2 B | c2 A F2 D | GBA GG/F/E | D3 [CE]3 | [B,B]DG B/c/dB | 
 cAF DEF | G3 G2 :|  