Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/8
M:4/4
K:A
['c2 cB ABcd c2', 'gB B2']  
X:1
L:1/8
M:4/4
K:A
[K:B] FBBd c2 cB | ABcd c2 B2 | abaf ge(3eee | cdef c2 B2 | fedB c2 cB | ABcd c2 Be | fBBf gBeB |1 
 cBcd B2 BG :|2 cBcd B2 ab || fB B2 fbfd | c2 Bd cdef | gB B2 eBgf | cB B2 cdfa | bB B2 Bbfd | 
 c2 Bd cdef | f2 gB B2 dB |1 cBcd B2 fg :|2 cBcd B2 z2 ||  