Develop a musical composition using the outlined alphabetical depiction of the structure and the provided theme.
X:1
L:1/8
M:4/4
K:C
['G, C/C/C C2 EGGB c2 ed cAAG', 'c3 d e g3 gedc fedc eccG']  
X:1
L:1/8
M:4/4
K:C
|: G, | C/C/C C2 EGGB | c2 ed cAAG | A/A/A AG A2 Aa | gecd ed d2 | CB, C/D/E G3 A | cded cA (3AAA | 
 A/B/c Gc FdEc | edcB c3 :: d | e g3 gedc | fedc eccG | A/A/A AG A/A/A Aa | gecd ed d/d/d | 
 egga g e3 | fedc e c3 | AcGc FdEc | edcB c3 :|  