Develop a musical creation based on the specified alphabetical structure and given motif.
X:1
L:1/8
M:2/4
K:G
['GB dd B/A/G AA']  
X:1
L:1/8
M:2/4
K:G
 D | G/G/G GB | dd B/A/G | AA AA | AA F/E/D/ D/ | GG GB | dd B/A/G | AA DF | G/G/G z2 |]  