Create a melodious tune based on the given chord progression.
'G', 'D', 'G', 'D', 'A', 'D', 'A', 'D', 'A', 'D', 'A', 'D', 'A', 'D', 'A', 'D', 'A', 'D', 'A', 'D', 'A'  
X:1
L:1/16
M:2/4
K:D
|:"G" [bg]4"D" [af][bg][af][ge] | [fd][ec][fd][ge] [af]2[af]2 |"G" [bg]2[bg]2"D" [af][bg][af][ge] | 
 [fd][ec][fd][ge]"A" [ec]2[ec]2 ::"D" [dA]2[ec][fd]"A" [ge]2[gc][ac] | 
"D" [fd]2[fd][ge]"A" [ac]2[ae]2 |"D" [dA]2[ec][fd]"A" [ge]2[gc][ac] | 
"D" [fd][ec][fd][ge]"A" [ec]2[ec]2 ::"D" [dF]2[dF]2"A" [eG]2[eG][fA] | 
"D" [dF]2[dF]2"A" [eG]2[eG][fA] |"D" [dF]2[dF]2"A" [eG]2[eG][fA] |"D" [dF]2[dF]2"A" [AE]2[AE]2 :|  