Develop a musical creation based on the specified alphabetical structure and given motif.
X:1
L:1/8
M:4/4
K:G
['BGDG B3 A BAGB d3 d efgd', 'B3 A BAGB d3 d efgd B3']  
X:1
L:1/8
M:4/4
K:G
 A | BGDG B3 A | BAGB d3 d | efgd B3 G | AGFG A2 AA | BGDG B3 A | BAGB d3 d | efgd B3 G | 
 AcBA G4 :| gf | g2 gd B3 A | BAGB d3 d | efgd B3 G | AGFG A4 |1 g2 gd B3 A | BAGB d3 d | 
 efgd B3 G | AcBA G2 :|2 BGDG B3 A | BAGB d3 d | efgd B3 G | AcBA G4 :|  