Design a musical composition incorporating the alphabetic expression of the chosen structure and the provided melodic theme.
X:1
L:1/8
M:4/4
K:G
['EA/A/AB cBAc', "aee/e/e abc'b"]  
X:1
L:1/8
M:4/4
K:G
|: EA/A/AB cBAc | Be/e/ef gedB | EA/A/AB cBAc | BAGB A/A/A AG | EA/A/AB cBAc | Be/e/ef gedB | 
 c'age dB G2 | EGBG A4 :: aee/e/e abc'b | aged edBG | aee/e/e abc'b | ageg a4 | aee/e/e abc'b | 
 aged edBG | EA/A/AB cBAc |1 BAGB Aceg :|2 BAGB A4 ||  