Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/16
M:3/4
K:F
['va2(ba g2)(ag f2)gf e2(fe) d2fd c4', '(vCF)(AF) (CF)(AF) (CF)(AF) (vCF)(Ac) (dc)_BA']  
X:1
L:1/16
M:3/4
K:F
|: va2(ba g2)(ag f2)gf | e2(fe) d2fd c4 | (Tuc4 B2)cB A2c2 | (cd)B2 G2AG F4 va2(ba g2)(ag f2)gf | 
 e2(fe) d2fd c4 | (ucdcA B2)cB A2c2 | (cB)GE [FA]8 :: vC2>F2 A2(F2 A2)(vc2 | c2)=Bc (dc)_BA B4 | 
 uG2>(c2 e2)(c2 e2)(vg2 | g2)(fg) (ag)fe f4 | vC2>(F2 A2)(F2 A2)(uc2 | c2)=Bc (dc)_BA (Bc)BA | 
 vG2(c2 e2)ec e2g2 | (g2a2) uf8 | (vCF)(AF) (CF)(AF) (CF)(AF) | (vCF)(Ac) (dc)_BA B2>G2 | 
 (vGc)(ec) (Gc)(ec) (Gc)(ec) | (Gc)(eg) (ag)fe f4 | (vCF)(AF) (CF)(AF) (CF)(AF) | 
 (vCF)(Ac) (dc)_BA (Bc)BA | G2(c2 e2)ec e2g2 | (g2a2) uf8 |]  