Compose a melodious orchestration that adheres to the designated chord structure.
'D', 'A', 'D', 'Em', 'A', 'A', 'D', 'D', 'G', 'A', 'D', 'G', 'A', 'D', 'G', 'Em', 'A', 'D', 'G', 'A', 'D'  
X:1
L:1/8
M:2/2
K:D
 fg |"D" a2 fd"A" g2 ec |"D" d2 AG FDDF |"Em" E2 FG ABcd |1,3"A" eAfA g2 :|2,4"A" eABc"D" d2 :| 
 z2 |:"D" defg aAfA |"G" gfed"A" ceAe |"D" defg aAfA |"G" gba^g"A" a4 |"D" abaf"G" gfed | 
"Em" efgA"A" GFED |"D" F2 AF"G" G2 BG |"A" Addc"D" d4 :|  