Design a musical arrangement using the alphabetical representation of the given sequence and the supplied motif.
X:1
L:1/8
M:4/4
K:G
['BcBA GEDE G2 BG cGBG B3 G']  
X:1
L:1/8
M:4/4
K:G
 BcBA GEDE | G2 BG cGBG | B3 G AGDG | EAAG (3ABA GA :|  