Develop a musical composition using the outlined alphabetical depiction of the structure and the provided theme.
X:1
L:1/8
M:2/4
K:G
['ge dc/B/', 'GB GB']  
X:1
L:1/8
M:2/4
K:G
 ge dc/B/ | cd (ef) | ge dc/B/ | eA A2 | ge dc/B/ | cB (ce) | dc BA | G2 G2 :: GB GB | GB BA/G/ | 
 FA FA | FA AG/F/ | GB GB | (GB) (Bd) | ec AF | G2 G2 :|  