Create a composition based on the provided chord sequence.
'Bb', 'F', 'Bb', 'F', 'C7', 'F', 'C7', 'F'  
X:1
L:1/8
M:2/4
K:F
|:"Bb" BB BB |"F" AF FF |"Bb" BB BB |"F" A2 cc |"C7" Gc cc |"F" Ac cc |"C7" cB AG |"F" F2 F2 :|  