Write musical pieces that adapt to the predetermined chord shifts.
'G', 'C', 'G', 'D', 'G', 'G', 'G', 'G', 'C', 'G', 'D', 'G', 'G'  
X:1
L:1/8
M:2/4
K:G
 (3GFE |:"G" D2 E2 G2 A2 | [DB]4 [DB]3 A | [DB]2 eB dBAG |"C" [CE]6 (3EFE |"G" DD E2 G2 A2 | 
 [DB]4 [DB]3 A | [DB]2 eB"D" dBAE |1"G" [DG]6 (3GFE :|2"G""G" [DG]6 ef |:"G" g2 ga g d3 | 
 e2 d2 B3 G | B2 eB dBAG |"C" [CE]6 ef |"G" gaba g2 d2 | eged B G3 | [DB]2 eB"D" dBAF |1 
"G" [GB]6 ef :|2"G" [GB]6 (3GFE |]  