Write musical pieces in accordance with the designated chord shifts.
'Bb', 'F7', 'Bb', 'Bb', 'Eb', 'F7', 'Bb', 'F7', 'Bb'  
X:1
L:1/8
M:2/2
K:Bb
 FE |"Bb" DFBc d2 FE | DFBc d2 cB |"F7" AFcF eFcF |1,3 AFcF e2 :|2,4"Bb" BABc B2 :: FE | 
"Bb" D2 BD FBDF | BDFB- BDFB |"Eb" E2 BE GBEG |"^(Cm)" BEGB- BEGB |"F7" F2 cF AcFA | eFAd- dFcF | 
"Bb" BABd"F7" cBAc |"Bb" BABc B2 :|  