Generate musical content according to the specified chord sequence.
'D', 'A7', 'D', 'A7', 'D', 'D', 'A7', 'D', 'A7', 'D', 'D', 'A7', 'D', 'A7', 'D'  
X:1
L:1/16
M:2/4
K:D
"D" ef2a fede | fdeB d2>e2 | fafe dABA |"A7" [AA]6 FE |"D" DEFG ABd2 | fedf dBde | fafd"A7" efe2 | 
"D" D6 FE |"D" DEFG ABd2 | fedf eBde | fafe dABA |"A7" [AA]6 FE |"D" DEFG ABd2 | fedf fBde | 
 fafd"A7" efe2 |"D" [df]8 |:"D"{f} a8 |{e} f4- fafe | d2>B2 BAF2 |"A7" E6 FE |"D" D2F2 A2d2 | 
 fedf eBde | fafd"A7" efe2 |"D" [Fd]8 :|  