Write musical pieces that adapt to the predetermined chord shifts.
'C', 'G7', 'C', 'G7', 'C', 'G7', 'C', 'G7', 'C', 'G7', 'C', 'G7', 'C', 'Am', 'Em', 'Dm', 'A', 'F', 'C', 'Am', 'Em', 'Dm', 'A', 'F', 'C'  
X:1
L:1/8
M:3/4
K:C
"C" cB cd c2 | Gc eG ce |"G7" DF BD FB |"C" cB cd c2 | cB cd c2 | Gc eG ce |"G7" DF BD FB | 
"C" c4 z2 ::"G7" Gd fG df |"C" Gc eG ce |"G7" GB dG Bd |"C" cB cd c2 |"G7" Gd fG df |"C" Gc eG ce | 
"G7" GB dG Bd |"C" c4 z2 ::"Am""_e" e"_d"d"_e" ef"_e" e2 |"Em" Be gB eg | 
"Dm""_f" F"_a"A"_d" d"_f"F"G7""_a" A"_d"d |"C""_e" ed ef e2 |"Am""_e" e"_d"d"_e" ef"_e" e2 | 
"Em" Be gB eg |"Dm""_f" F"_a"A"_d" d"_f"F"G7""_a" A"_d"d |"C" c4 z2 :|  