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:G
['eaa aga']  
X:1
L:1/8
M:6/8
K:G
|: d |"Am" eAA eAA |"G" BGB"Em" GBd |"Am" eAA eAe |"Bm" def"G" gfg |"Am" eAA eAA |"G" BGB"Em" GBd | 
"C" ede"G" gdB | BAG"Am" A2 :: d |"Am" eaa aga |"Em" bab"G" ged |"Am" eaa aga |"Em" bab"G" g2 d | 
"Am" eaa aga |"Em" bab"G" ged |"C" def"G" gdB | BAG"Am" A2 :|  