Create harmonious melodies following the given letter notation and incorporating the designated theme.
X:1
L:1/8
M:6/8
K:D
['fAA fAA gAA gAA aaa age', 'cde efg age edc']  
X:1
L:1/8
M:6/8
K:D
 fAA fAA | gAA gAA | aaa age | dcd efg | fAA fAA | gAA gAA | aaa age | dce d3 :| cde efg | 
 age edc | ddd deg | a2 g e2 d | cde efg | age edc | def gag | edc d3 :|  