Compose melodic pieces that follow the provided chord changes.
'D', 'Bm', 'G', 'A7', 'D', 'Bm', 'G', 'A7', 'D', 'D', 'Em', 'A7', 'D', 'G', 'A7', 'Bm', 'G', 'A7', 'D'  
X:1
L:1/8
M:4/4
K:D
 F |"D" A2 AB AFED | FAAB ABde |"Bm" fBBA Bcde |"G" fdgf"A7" efdB |"D" FAAB AFED | FAAB ABde | 
"Bm" fBBA"G" BcdB |"A7" AFEF"D" D3 :: g |"D" fgab afde | fdad fddf |"Em" efga beef | 
 gebe"A7" geeg |"D" fgaf bfaf |"G" defd"A7" efde |"Bm" fBBA"G" BcdB |"A7" AFEF"D" D3 :|  