Assemble a musical creation that incorporates the furnished motif and conforms to the predetermined alphabetical structure.
X:1
L:1/8
M:2/4
K:D
['af fd d2', 'd2 Af']  
X:1
L:1/8
M:2/4
K:D
|: a | af fd | d2 AA | dd ee | f/e/f/g/ fa | af fd | d2 Ad | ge dc | d3 :: f | d2 Af | d2 Af | 
 df df | d2 Aa | af fd | d2 Ad | ge dc | d3 :|  