Develop a musical creation based on the specified alphabetical structure and given motif.
X:1
L:1/8
M:4/4
K:G
['BG (3.G.G.G', '(3.G.G.G FGAB cAdc :|2 Bdgf edcB AGFE']  
X:1
L:1/8
M:4/4
K:G
 GABc d2 Bc | d2 gd adgd |1 GABc dBcB | Aaag fdcA :|2 GABc defg | a3 g fdcA |: 
 BG (3.G.G.G DG (3.G.G.G | BG (3.G.G.G cAdc |1 BG (3.G.G.G DG (3.G.G.G | FGAB cAdc :|2 Bdgf edcB | 
 AGFE DcBA ||  