Write musical pieces that adapt to the predetermined chord shifts.
'Am', 'G', 'Am', 'G', 'G', 'Am', 'Am', 'G', 'Am', 'G', 'Am', 'Am', 'G'  
X:1
L:1/8
M:4/4
K:Ador
"Am" A2 (3Bcd edBA |"G" G2 GA GEDz/B/ |"Am" A2 (3Bcd edBd |1"G" egdB BABG :|2"G" egdB"Am" BA A2 || 
"Am" a2 ea agef |"G" (3gag dg (3gag dg |"Am" a2 ea agab |"G" gedB"Am" BA A2 |"Am" (3aba ab agef | 
"G" (3gag ga g2 ge | dega (3bag ab | gedB BABG ||  