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:D
['F2 FG AF Df dA (3Bcd ecAg', 'd2 cd eA (3AAA efge afde bgeg']  
X:1
L:1/8
M:4/4
K:D
|: F2 FG AF Df | dA (3Bcd ecAg | fege fded | cBcd ecAG | F2 FG AF Df | dA (3Bcd ecAg | fege fded | 
 Addc d2 :: cd | eA (3AAA efge | afde bgeg | afdf geaf | gfed ecAG | F2 FG AF Df | dA (3Bcd ecAg | 
 fege fded | Addc d2 :|  