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:G
['', 'cADE{G} FEFG', 'g afge fge^c']  
X:1
L:1/8
M:4/4
K:G
 d^c || (3.A.B.AGB ADDD | (3.E.F.GAB c2 d2 | cAGB B | cADE{G} FEFG | (3.A.c.AGB ADDE | 
 (3.E.F.GAB (Bc) (cd) | cAGB A2 AB |{d} cADE{G} FEFG || A^cde =fedf | ed^cA dcAG | A(^cd)(e f3) g | 
 afge fge^c | d^cAG | A^cde =fd(3.d.d.d | ec(3.c.c.c dcAG | A^cde f3 g | afge fge^c | d^cAG ||  