Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/8
Q:1/4=90
M:3/4
K:Bb
['d d/ d/ e d c B']  
X:1
L:1/8
Q:1/4=90
M:3/4
K:Bb
 D | G2 B2 AB | G2 ^F z D | G2 B2 A B |[M:2/4] G2 z G | d d/ d/ e d | c B A B | c d f=e | d4 | 
 d d/ d/ e d | c B G G | A A d d |[M:3/4] BA G4 ||  