Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/8
Q:1/4=140
M:2/4
K:D
['d2 cd |{c} B2 Ad cdef', 'GE cdef']  
X:1
L:1/8
Q:1/4=140
M:2/4
K:D
 d2 cd |{c} B2 Ad | cdef | gagf | d2 cd |{c} B2 Ad | cdef | d2 D2 :: A2 FD | B2 GE | cdef | 
 d/c/d/e/ df | A2 FD | B2 GE | cdef | d2 D2 :|  