Develop a musical creation based on the specified alphabetical structure and given motif.
X:1
L:1/8
M:3/4
K:G
['GB Ac Bd ef g2 B2 cd', 'd2 Bd/B/ Ge ed dc cB']  
X:1
L:1/8
M:3/4
K:G
 GB Ac Bd | ef g2 B2 | cd ed cB | AG F/G/F/E/ D2 | GB Ac Bd | ef g2 B2 | cd ed cB | A/G/F/A/ G4 :: 
 d2 Bd/B/ Ge | ed dc cB | d2 Bd/B/ Ge | ed dc cB | GB Ac Bd | ef g2 B2 | cd ed cB | A/G/F/A/ G4 :|  