Write musical pieces that adapt to the predetermined chord shifts.
'F', 'C7', 'Bb', 'F', 'Bb', 'C7', 'F', 'C7', 'Bb', 'F', 'Bb', 'F', 'C7', 'F', 'C7', 'F', 'C7', 'F', 'C7', 'F', 'C7', 'F'  
X:1
L:1/4
M:3/4
K:F
"F" (3c/c/c/ c f |"C7" f e e |"Bb" e d d |"F" d c c | (3f/f/f/ a c |"Bb" c d d |"C7" (3c/c/c/ e g | 
"F" a f f | (3c/c/c/ c f |"C7" f e e |"Bb" e d d |"F" d c c |"Bb" c B/>A/ B/>c/ | 
"F" B A/>G/ A/>B/ |"C7" a g/>^f/ g/>a/ |"F" f f z |:"C7" B B A/>G/ |"F" F/>d/ c c | 
"C7" c/e/ e d/c/ |"F" c/f/ f c/A/ |"C7" B B A/>G/ |"F" F/>d/ c c |"C7" c/e/ e/d/ B/G/ |"F" F F z :|  