Develop a musical arrangement using the specified sequence in alphabetic representation and the provided motif.
X:1
L:1/8
M:4/4
K:G
['', 'B2 GB DBGB', 'g3 a b3 a']  
X:1
L:1/8
M:4/4
K:G
 dc |: B2 GB DBGB | d2 BG d2 BG | B2 GB DBGB | c2 AD c2 AD | BGBd c2 dc | BGBd gfdc | BGBd gfdc |1 
 B2 G2 G2 dc :|2 B2 G2 G2 Bc || dgBg d2 Bd | gBdg B3 d | g3 a b3 a | gfgb d3 e | =fefd cdcd | 
 =fefd g3 e | fgfd cdfa | g2 gf g3 a | b3 a gfga | b2 bg d3 e | fafd fafd | gbgd gbgd | fafd fafd | 
 dccB c2 dc | BGBd d2 cA | BGBd gfdc | BGBd gfdc |1 B2 G2 G2 Bc :|2 B2 G2 G2 dc ||  