Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/8
M:4/4
K:D
['D2 (3DDD D>FA>B', 'A>d (3dcd']  
X:1
L:1/8
M:4/4
K:D
 D2 (3DDD D>FA>B | d2 f>d e>d (3Bcd | (3FED A>D B>DA>D | G>FE>D (3EFG F>E | D2 (3DDD D>FA>B | 
 d>Af>d e>dB>d | A>df>a g>ec>e | (3efe d>c d2 :| f>d (3dcd A>d (3dcd | f>d[Aa]>d b>[df]a>[df] | 
 g>e (3e^de c2 (3=def | (3gag b>g a>gf>d | A>d (3dcd A>dF>d | A>d (3dcd A>dF>d | A>df>a g>ec>e | 
 (3efe d>c d2- :|  