Develop a melody while staying within the specified chord structure.
'D', 'G', 'A7', 'D', 'Em', 'A7', 'D', 'G', 'A', 'D', 'A7', 'D', 'D', 'D', 'A', 'A7', 'D', 'G', 'Em', 'A7', 'D', 'Em', 'A7'  
X:1
L:1/8
M:6/8
K:D
"^A" A/G/ |S"D" FGA A2 d |"G" BGB"A7" A2 G |"D" FGA Adf |"Em" f3"A7" e2 G |"D" FGA A2 d | 
"G" BGB"A" A2 b |"D" afd"A7" gec |"D" d3 D2 |"^B" f/g/ |"D" aba d'2 a |"D" f3 d2 f |"A" efe a2 e | 
"A7" c3 ABc |"D" d2 d"G" Bcd |"Em" e2 e"A7" cde |"D" fga agf |"Em" edc"A7" BA"^D.S."G ||  