Develop a musical creation based on the specified alphabetical structure and given motif.
X:1
L:1/8
M:4/4
K:G
['(3def gd Bd', 'BG FG']  
X:1
L:1/8
M:4/4
K:G
 (3def | gd Bd GB (3def | gd Bd G2 AB | cA FA DF Ac | ed ^cd B2 (3def | gd Bd GB (3def | 
 gd Bd G2 AB | cA FA DF AB | A2 G2 G2 :: GA | BG FG DG FG | BG FG D2 AB | cA FA DF Ac | 
 ed ^cd B2 GA | BG FG DG FG | BG FG D2 AB | cA FA DF AB | A2 G2 G2 :|  