Produce a musical composition based on the provided chord structure.
'D', 'A7', 'D', 'D7', 'G', 'Em', 'A7', 'D', 'A7', 'D', 'Em', 'A7', 'D', 'D', 'D7', 'G', 'A7', 'D', 'E7', 'A7', 'D', 'Em', 'A7', 'D', 'G', 'A7', 'D'  
X:1
L:1/8
M:4/4
K:D
 fg |"D" a2 fd"A7" g2 ec |"D" d2 AG"D7" FDFA |"G" E2 FG ABcd |"Em" eAfA"A7" g2 fg | 
"D" a2 fd"A7" g2 ec |"D" d2 AG FDFA |"Em" E2 FG ABcd |"A7" eABc"D" d2 :: A2 |"D" defg"D7" aAfA | 
"G" gfed"A7" ceAe |"D" defg aAfA |"E7" gba^g"A7" a3 =g |"D" abaf"Em" gfed |"A7" eAfA GFEG | 
"D" F2 AF"G" G2 BG |"A7" Adce"D" d2 :|  