Construct a tune that fits the designated chord arrangement.
'Bb', 'F', 'Bb', 'Bb', 'F7', 'Bb', 'Bb'  
X:1
L:1/4
M:4/4
K:Bb
"Bb" B2 B B |"F" c A"Bb" B2 |"Bb" d2 d d |"F7" e c"Bb" d2 |"Bb" f2 g g | f2 f e | d2 c2 | B3 z :|  