Write a tune that sticks to the prescribed chord sequence.
'Bb', 'F7', 'Bb', 'Eb', 'D', 'G7', 'C7', 'F7', 'Bb', 'Bb7', 'Eb', 'F7', 'Bb'  
X:1
L:1/8
Q:1/4=110
M:4/4
K:Bb
"Bb" dF |"F7" c2 c2 cF |"Bb" B2 B2 BB |"Eb" B3 G Bc |"D" d4"G7" dG |"C7" c2 c2"F7" cF | 
"Bb" B2 B2"Bb7" dd |"Eb" e2 G2"F7" dc |"Bb" B4 |]  