Construct a melodically pleasant tune that corresponds with the specified chord structure.
'D', 'D/F#', 'G', 'A7', 'D', 'Bm', 'D/F#', 'G', 'A7', 'D', 'D/F#', 'G', 'A7', 'D', 'Bm', 'D/A', 'A7', 'D'  
X:1
L:1/4
Q:1/2=116
M:2/2
K:D
|:"^A" d |"D" d A d e |"^/" f d f g |"D/F#" a2"G" g f |"A7" e/d/e/f/ e d |"D" d A d e | 
"Bm" f d f g |"D/F#" a2"G" g f |"A7" e3 ::"^B" A |"D" A G/A/ F A |"D/F#" A G/A/ F A |"G" d c B e | 
"A7" c B/c/ A a |"D" a g/a/ f f |"Bm" f e/f/ d d |"D/A" F d"A7" E c |"D" d3 :|  