Produce a musical composition based on the provided chord structure.
'D', 'A7', 'D', 'G', 'A7', 'D', 'D', 'A7', 'D', 'G', 'A7', 'D', 'D', 'B7', 'Em', 'A7', 'D', 'G', 'A7', 'D', 'D', 'G', 'Em', 'A7', 'D', 'G', 'A7', 'D'  
X:1
L:1/8
M:2/2
K:D
"D" f2 fd f2 fd | f2 fd"A7" cecA |"D" f2 fd"G" gfed |"A7" cABc"D" defg |"D" fafd fafd | 
 fafd"A7" cecA |"D" fafd"G" gfed |"A7" cABc"D" D2 D2 ||"D" a2 af"B7" b2 ba |"Em" g2 ge"A7" a2 ag | 
"D" f2 fd"G" gfed |"A7" cABc"D" defg |"D" a^gaf"G" b^ab=a |"Em" gfge"A7" a^ga=g |"D" fefd"G" gfed | 
"A7" cABc"D" D2 D2 |]  