Design a musical composition incorporating the alphabetic expression of the chosen structure and the provided melodic theme.
X:1
L:1/8
M:6/8
K:Ador
['a aga bge']  
X:1
L:1/8
M:6/8
K:Ador
"Am" eAA eAA |"G" BAB GBd |"Am" eAA eAA |"G" def gfg |"Am" eAA eAA |"G" BAB GBd | edB gBB | 
 BAG"Am" A3 :|"Am" A2 a aga |"G" bge dBG |"Am" A2 a aga |"G" bge g2 d |"Am" e2 a aga |"G" bge dBd | 
 edB gBB | BAG"Am" A3 :|  