Develop harmonious melodies based on the provided chord structures.
'D', 'FA', 'EG |', 'GF |', 'A', 'AB AGFE |', 'GF |', 'A', 'D', 'A', 'D', 'D', 'A', 'D', 'A', 'D', 'G', 'A', 'AG |', 'G', 'A', 'D', 'A', 'D'  
X:1
L:1/8
M:4/4
K:D
|: (3ABc |"D" dA"^d"FA"G" BG"^g"EG |"D" (3FED"^d" FA dA"^d"GF |"G" Ee"^g"ef (3gfe"^g" fd | 
"A" ec"^a"AB AGFE |"D" Fd"^d"dc dA"^d"GF |"G" Ee"^g"ef (3gfe"A" cA |"D" df"^d"af"A" bg"^a"ec | 
"D" (3ded"^d" dc d2 :: (3ABc |"D" df"^d"af"A" bg"^a"ec |"D" df"^d"af ge"A"cA | 
"D" df"^d"af (3gfe"^d" fd |"G" (3BdB"^g" BA"A" Bd"^a"AG |"D" Fd"^d"dc dA"^d"GF | 
"G" Ee"^g" ef (3gfe"A" cA |"D" df"^d"af"A" bg"^a"ec |"D" (3ded"^d" dc d2 :|  