Formulate a musical piece by utilizing the specified motif and alphabet-based structure.
X:1
L:1/8
M:4/4
K:F
['BA D2 CD F2']  
X:1
L:1/8
M:4/4
K:F
 F>G |"F" A2 C2"Dm" D2 F2 |"Bb" BA G<F"Dm" D2 CD |"F" F2 f2 cd fc |"Bb" d4"C7" c2 de | 
"F" fe d<c"Dm" de fA |"Bb" BA G<F"C" D2 CD |"F" F2 f2"Bb" c>d B>c |"C" A3 G"F" F2 :: (3cde | 
"F" fe dc"Dm" de fd |"Gm" gf ed"C" ef ge |"F" fe fg"Dm" af ga |"Bb" d4"C" c2 fg | 
"F" ag fd"Dm" cd/e/ fA |"Bb" BA G<F"C" D2 CD |"F" F2 f2"Bb" c>d B>c |"C7" A3 G"F" F2 :|  