Write musical pieces that adapt to the predetermined chord shifts.
'Gm', 'D', 'Gm', 'D', 'Gm', 'D', 'Gm', 'D', 'Gm', 'D', 'Gm', 'Gm', 'D', 'D', 'Gm', 'Cm', 'D', 'Gm'  
X:1
L:1/16
M:2/4
K:Gmin
"Gm" d^cde"D" d=cBA |"Gm" G2B2 BAG2 |"D" ^F2A2 AGF2 |"Gm" G^FGA"D" BABc |"Gm" d^cde"D" d=cBA | 
"Gm" G2B2 BAG2 |"D" ^F2A2 D2=EF |"Gm" G2G2 G4 ::"Gm" G^FGA B2G2 |"D" ^F2G2 A4 |"D" D2^F2 A2c2 | 
"Gm" cBAB G4 | G^FGA B2G2 |"Cm" c2d2 e4 |"D" d^cde d=cBA |"Gm" G2G2 G4 :|  