Compose a piece using the alphabetic notation of the assigned musical structure and the provided melodic motif.
X:1
L:1/8
M:2/2
K:G
['B2 BA BcdB', 'D2 EFGB']  
X:1
L:1/8
M:2/2
K:G
 B2 BA BcdB | A2 AG Addc | B2 BA BcdB | AG (3EDE G2 G2 :: GE D2 EFGB | AGEF GBdc | BD D2 EFGB | 
 AG (3EDE G2 G2 :|  