Develop a musical creation based on the specified alphabetical structure and given motif.
X:1
L:1/4
M:4/4
K:D
['A A G/F/ E']  
X:1
L:1/4
M:4/4
K:D
 D/F/ | A A G/F/ E | D B A A/B/ | A A G/F/ E | D2 B2 | A d/=c/ B B | A A G/F/ E | D2 z |]  