Develop musical pieces based on the specified chord pattern.
'D', 'Em', 'A', 'D', 'Bm', 'Em', 'A7', 'D', 'A7', 'A7', 'D7', 'G', 'A7', 'D', 'Bm', 'Em', 'A7', 'D', 'D7', 'G', 'A7', 'D', 'Bm', 'Em', 'A7', 'D'  
X:1
L:1/8
M:2/2
K:D
|: FG |"D" ABAG .F2 .A2 | f4 d2 AA | ABAG .F2 .A2 | f4 d2 e2 |"Em" e3 e"A" .g2 .e2 | 
"D" dcde"Bm" fafd |"Em" c3 d"A7" .e2 .c2 |1"D" eddd"A7" .d2 :|2"A7" eddd"D7" .d2 |: fg | 
"G" .a2 .g2"A7" e4 |"D" .g2 .f2"Bm" d4 |"Em" f3 e"A7" .B2 .c2 |"D" dcde"D7" f2 fg | 
"G" .a2 .g2"A7" e4 |"D" .g2 .f2"Bm" d2 c2 |"Em" B2 g2"A7" e2 c2 |"D" d4 d2 :|  