Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/8
M:4/4
K:D
['f3 f>dd c>BB B>ef', 'a3 f2 d c>BB B>ef', 'A>dd d3 d>cc c>BB', 'a>fa f<da c>BB B>ef']  
X:1
L:1/8
M:4/4
K:D
 A/d/ | f3 f>dd | c>BB B>ef | g3 g>ee | c<ec B>AA | f3 f>dd | c>BB B>ef | g>ec A>aa | d3 d2 :| 
 f/g/ | a3 f2 d | c>BB B>ef | g3 g2 e | c<ec B>AA | a3 f2 d | c>BB B>ef | g>ec A>aa | d3 d2 :| f | 
 A>dd d3 | d>cc c>BB | B>gg g>ee | c<ec B>AA | A>dd d3 | d>cc c>BB | g>ec A>aa | d3 d2 :| f/g/ | 
 a>fa f<da | c>BB B>ef | g>eg g2 e | c<ec B>AA | a>fa f<da | c>BB B>ef | g>ec A>aa | d3 d2 :|  