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:G
['(G/A/B/c/ d)B', 'gage abaf']  
X:1
L:1/8
M:2/2
K:G
 B | (G/A/B/c/ d)B gBdB | gBdB aAAB | (G/A/B/c/ d)B dBdB | cAdc BG G :: f | gage abaf | gage beef | 
 gage abaf | gddc BG G :|  