Develop harmonious melodies based on the provided chord structures.
'D', 'A7', 'D', 'D7', 'G', 'Em', 'D', 'A7', 'D', 'A7', 'D', 'D7', 'G', 'Em', 'A7', 'D', 'A7', 'D', 'C', 'D', 'G', 'Em', 'A7', 'D', 'A7', 'D'  
X:1
L:1/8
Q:1/4=200
M:4/4
K:D
 A2 |"D" dfaf"A7" gfeg |"D" fdAG"D7" FGA=c |"G" BGFG"Em" EFGg |"D" fdec"A7" dcBA | 
"D" dfaf"A7" gfeg |"D" fdAG"D7" FGA=c |"G" BGFG"Em" EFGg |1"A7" fdec"D" d2 :|2"A7" fdec"D" defg |: 
 a2 fd dfaf | dfaf bagf |"C" gfge =cege | =cege agfe |"D" a^gaf dfaf | dfaf bagf | 
"G" gfef"Em" gbag |1"A7" fdec"D" defg :|2"A7" fdec"D" d2 |]  