Construct music pieces following the indicated chord shifts.
'D', 'Bm', 'G', 'A7', 'D', 'Bm', 'G', 'D', 'A7', 'D', 'D', 'Em', 'A7', 'D', 'A7', 'Bm', 'G', 'D', 'A7', 'D'  
X:1
L:1/8
M:2/4
K:D
"D" FA AB/c/ |"Bm" d>e dc |"G" B>A Bd |"A7" e>d ef |"D" FA AB/c/ |"Bm" d>e fe |"G" dB"D" Af | 
"A7" e2"D" d2 |]"D" fa d>e | fa ag/f/ |"Em" gb e>f | gb"A7" ba/g/ |"D" fa/f/"A7" ef/e/ | 
"Bm" de f/a/f/e/ |"G" dB"D" Af |"A7" e2"D" d2 |]  