Assemble a musical creation that incorporates the furnished motif and conforms to the predetermined alphabetical structure.
X:1
L:1/8
M:2/2
K:D
['d2 fd adfd']  
X:1
L:1/8
M:2/2
K:D
"D" D2 FD ADFD | Adde fded |"A" cAAB"C" =c2 cd |"C" ea{b}ag"A" edcd |"D" D2 FA defd | 
"A" cAAB cdeg |"D" fdec"G" d2 cA |"A" BdAF EDFA ::"D" d2 fd adfd |"A" ecAB cdec |"D" d2 fd adfd | 
"A" cdeg"D" fd d2 |"D" d2 fd adfd |"A" cdef"G" g2 fg |"D" (3(agf) ge fdec |"G" dBAG"D" FD D2 :|  