Design a melodically engaging tune in accordance with the suggested chord progression.
'G', 'A', 'D', 'G', 'A', 'D', 'A', 'A', 'D', 'D', 'A', 'D', 'D', 'G', 'A', 'D', 'A', 'D', 'D', 'G', 'A', 'D'  
X:1
L:1/8
M:6/8
K:D
 a |"G" ged"A" cAG |"D" FDE F2 G | FED def |"G"{a} gfg"A" eag |"D" fed"A" cAG |"A" cAG"D" FDE | 
"D" DFA"A" eag |"D" fdd d2 :: (f/g/) |"D" a3 dfa | agb afd |"G" g>gg gef | ged"A" cAG | 
"D" FED dcd |"A" edc"D" d2 e |"D" fed"G" cAG |"A" Adc"D" d2 :|  