Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/8
M:4/4
K:D
['afTed TB2 d2 afTed{ga} b2 a2 gfTed', '(af) b2', 'd4 a3 f (gf)(ed) (BA)(Bc) d2 D2', 'a2 f>a b3', 'BdB gdB Bba gdB BdB Tc2 A', 'afb afd (f/g/a)f', 'fBB dBB bBB dBB fBB Tc2 A', 'afb afb']  
X:1
L:1/8
M:4/4
K:D
|:"_Slow" afTed TB2 d2 | afTed{ga} b2 a2 | gfTed B2 d2 | A2 B>c d4 :: A3 b afTed | 
 afTed{ef} g2 f2 | A3 B defg | a2 Tg>f e4 | d3 b (af) b2 | (af) b2 afTed | gfTed B2 d2 | 
 A2 (B>c) d4 :: a3 f (gf)(ed) | (BA)(Bc) d2 D2 | a2 ba (gf)(ed) | B2 (A>B) d4 :: a2 f>a b3 d' | 
 afTed B2 d2 | a2 f>a b3 a | d'baf{f} e4 | (d>c)(c>B) (B>A) A2 | (gf)(ed){ga} b2 a2 | 
 (gf)(ed) B2 d2 | A2 (B>c) d4 ::[M:6/8]"_Brisk" gdB BdB | gdB Bba | gdB BdB | Tc2 A (c/d/e)c :: 
 d2 a afb | afd (f/g/a)f | d2 a afd | ecA (c/d/e)c | d2 a afb | afd (f/g/a)f | bge afd | 
 ecA (c/d/e)c :: dBB fBB | dBB bBB | dBB fBB | Tc2 A (c/d/e)c :: d2 b afb | afb afd | d2 b afd | 
 ecA ecA | d2 b afb | afb afb | afa geg | fdf ecA :|  