Design a melodically engaging tune in accordance with the suggested chord progression.
'D', 'D', 'A7', 'D', 'D', 'D', 'A7', 'D', 'D', 'Em', 'D', 'A7', 'D', 'G', 'D', 'A7', 'D'  
X:1
L:1/4
M:4/4
K:D
 A/ |"D" A d f3/2 f/ |"^(G)" g f"D" f3/2 f/ |"A7" f e e3/2 f/ |"D" e d d z/ d/ |"D" A d f f/f/ | 
"^(G)" g f"D" f3/2 f/ |"A7" f e e3/2 f/ |"D" e d d z |"D" a a a f |"Em" g g g e |"D" f3/2 f/ f d | 
"A7" e c B A |"D" a a a f |"G" g g g2 |"D" f d/d/"A7" e f |"D" e d d z/ |]  