Generate musical content according to the specified chord sequence.
'D', 'G', 'A', 'D', 'G', 'Em7', 'A7', 'D', 'G', 'A', 'D', 'A7', 'D', 'D'  
X:1
L:1/4
M:2/2
K:D
"D" d D F A |"G" B/A/B/c/"A" d e |"D" f/g/ a"G" B/c/ d |"Em7" e3/2 f/"A7" e c |"D" d D F A | 
"G" B/c/ d"A" c a/g/ |"D" f d"A7" e c |1"D" d2 d2 :|2"D" d2 d ||  