Create a musical composition employing the given alphabetic structure and melodic theme.
X:1
L:1/8
M:6/8
K:G
['fed AFA', 'f2 a e2 a']  
X:1
L:1/8
M:6/8
K:G
 A | fed AFA | BGB AFA | fed AFA | Bdc d2 :: a | f2 a e2 a | dcd cBA | f2 a e2 a | ba^g a2 a | 
 b2 b a2 a | g2 g fed | fed Bgf | eBc d2 :|  