Develop a musical composition using the outlined alphabetical depiction of the structure and the provided theme.
X:1
L:1/8
M:2/2
K:G
['g dGBG', 'EGG d g2 b/a/g/f/ gdBd Fd (e/d/c/B/)']  
X:1
L:1/8
M:2/2
K:G
 g | dGBG dG (e/d/c/B/) | dGBG F A2 g | dGBG dBgd | (e/d/c/B/) dD EGG :| d | g2 b/a/g/f/ gdBd | 
 Fd (e/d/c/B/) cAAd | gbag dgBd | egfa dggd | gdbg fdc'a | bgdg faac' | bgdg ecAc | BGdD DGG ||  