Compose a melodic line that follows the given chord progression.
'D', 'G', 'D', 'A', 'D', 'G', 'D', 'G', 'A', 'D', 'D', 'A', 'A', 'G', 'D', 'D', 'G', 'A', 'D'  
X:1
L:1/8
M:2/4
K:D
 D/E/ |"D" F>E FA |"G" G>F GB |"D" A>B cd |"A" e/f/g/e/"D" dA |"G" B>c dB |"D" A/B/A/G/ FA | 
"G" GE"A" FE |"D" D2 D :: d/e/ |"D" fd fd | fd f/g/a |"A" e>f ed |"A" e/f/e/d/"G" Bd |"D" A>G FG | 
"D" A/B/A/G/"^(A)" FA |"G" GE"A" FE |"D" D2 D :|  