Create a musical composition employing the given alphabetic structure and melodic theme.
X:1
L:1/8
M:2/2
K:G
['GBdc BAGB', 'aged ^cdef']  
X:1
L:1/8
M:2/2
K:G
 G2 dG BGdG | GBdc BAGB | A2 eA cAeA | Aced cAFA | G2 dc BcdB | GBdc BAGB | ABcd efge |1 
 aged cAFA :|2 aged ^cdef |: g2 gf gfef | gedc BGGd | eaa^g a=geg | aged ^cdef | gbaf g2 ef | 
 gedc BAGB | ABcd efge |1 aged ^cdef :|2 aged cAFA |]  