Write musical pieces that adapt to the predetermined chord shifts.
'G', 'Am', 'D', 'G', 'D', 'G', 'G', 'G', 'Am', 'D', 'G', 'C', 'D', 'G'  
X:1
L:1/8
M:4/4
K:G
 d2 |"G" g2 dg Bgdg |"Am" edcd"D" edef |"G" g2 dg Bgdg |"D" cedc"G" BGGd :|"G" BdGd BdGd | 
"^D/nF" cdAd cdAd |"G" BdGd BdGd |"Am" edcB"D" AFDF |"G" BdGd BdGd |"C" Gece Gece | 
"D" deFg ac'ba |1"G" g4 g2 d2 :|2 g2 ||  