Develop a musical creation based on the specified alphabetical structure and given motif.
X:1
L:1/4
M:4/4
K:D
['G A G/A/']  
X:1
L:1/4
M:4/4
K:D
 D | A A/A/ A G | =c/c/ A2 A | =c A A/G/ =F | G _B A2 | =c G A G/A/ | G =F/D/ =C E | 
 =F/F/ G A G/A/ | E2 D2 | z3 |]  