Write musical pieces that adapt to the predetermined chord shifts.
'G', 'C', 'G', 'C', 'Em', 'Am', 'C', 'D', 'G', 'C', 'G', 'C', 'G7', 'C', 'G', 'D', 'G', 'G', 'Am', 'C', 'D', 'G', 'C', 'G', 'D', 'G'  
X:1
L:1/8
M:4/4
K:G
 dB |"G" GBdg"C" egdB |"G" GBdg"C" eg"Em"dg |"Am" eAcA eAcA |"C" cdef"D" gedB |"G" GBdg"C" egdB | 
"G" GBdg"C" eg"G7"dB |"C" cdef gedc |"G" BG"D"AF"G" G2 :: Bc |"G" dg g2 bg g2 | dgfg egdg | 
"Am" eAcA eAcA |"C" cdef"D" gedB |"G" dg g2 bg g2 | dgfg egdg |"C" cdef gedc |"G" BG"D"AF"G" G2 :|  