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:C
['ccc ceg', 'd2 f2 f eAe g2 f ece']  
X:1
L:1/8
M:6/8
K:C
 ccc ceg | ccc ceg | eee e2 d | eee e2 e/f/ | ggg gag | fff fgf | eee ege | ddd d2 :: f2 f eAe | 
 g2 f ece | cge cge | ggg g3 | cGc dBd | ece f3 | gfe fed | ccc c2 :|  