Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/8
Q:1/4=140
M:3/4
K:Dmin
['F2 F2 (3F(GF) E2 E2', 'g>e f2 (3(fgf)', 'D2 (3D(ED)', '^c>A (D>E F)A d^c (3e(fe) (3d(^c=B) c>A']  
X:1
L:1/8
Q:1/4=140
M:3/4
K:Dmin
 vD>E F2 F2 | (3F(GF) E2 E2 | D>^C D>F AF | (3D(FD) (3^C(EC) vA,2 | (uD>E) F2 F2 | (3F(GF) E2 E2 | 
 (3F(GF) D>^C DF | (E^C) D4 ::{A} va2 (3(aba) g>e | f2 (3(fgf) e>d | (A>^c d)e fe | 
 (3g(ag) (3f(ed) (e2 | a2) (3(aba) g>e | f2 (3(fgf) e>^c | A>G (3E(GE) (3D(FD) | (3^C(EC) D4 :| 
 vA,>^C D2 D2 | (3D(ED) ^C2 C2 | A>G F>A dA | (3F(GF) (3A(=B^c) A2 | (uA>G) A,2 D2 | 
 (3D(ED) A,2 ^C2 | (3D(EF) A>G Ad | (3A(=B^c) d4 ::{A} vf2 (3(fgf) e>^c | d2 (3(ded) ^c>A | 
 (D>E F)A d^c | (3e(fe) (3d(^c=B) c>A | f2 (3(fgf) (3e(fg) | a2 (3(aba) g>e | 
 ^c>A (3G(AG) (3F(AF) | (3A(=B^c) d4 :|  