Create musical compositions that adhere to the specified chord changes.
'F', 'C7', 'F', 'C7', 'F', 'C7', 'F', 'C7', 'F', 'F', 'F', 'C7', 'F', 'C7', 'F', 'Bb', 'F7', 'Bb', 'F7', 'Bb'  
X:1
L:1/16
M:2/4
K:F
 cB |:"F" Acfa"C7" GBeg |"F" fFAd c2>f2 |"C7" eGce cd'c'b |"F" aegf cdcB | Acfa"C7" GBeg | 
"F" fFAd c4 |"C7" dc=Bc cbbe |1"F" f2a2 f2cB :|2"F" f2a2 f2 z2 ||"F" a2ff f2A2 |"C7" BdBd E4 | 
 c2eb c2eg |"F" c2fa c4 | a2ff f2A2 |"C7" BdBd E4 | c2bg ecBE |"F" F2Ac f2 z2 |: 
[K:Bb]"Bb" d2>B2 bagf |"F7" fee2 A4 | gff2 fee2 |"Bb" gff2 fdd2 | d2>B2 bagf |"F7" fee2 A4 | 
 f2ec ageA |"Bb" B2df b2 z2 :|  