Craft a musical work adhering to the specified theme and structure.
X:1
L:1/8
M:3/4
K:F
['cb bg'  
X:1
L:1/8
M:3/4
K:F
"F" ca fc Ac |"C7" cB G4 | CE Gc eg |"F" fa c4 | ca fc Ac |"C7" cB G4 | CE Gc eg |"F" f4 z2 :| 
"C7" cb bg e2 |"F" cc' c'a f2 |"C7" cb bg ge |"F" fa fa c2 |"C7" cb bg ge |"F" cc' c'a af | 
"C7" cb bg ge |"F" f4 z2 :|  