Develop a musical arrangement using the specified sequence in alphabetic representation and the provided motif.
X:1
L:1/8
M:6/8
K:Bb
['B B2 G A2 B c2 B', 'BAG F2 d cBc']  
X:1
L:1/8
M:6/8
K:Bb
 B | B2 G A2 B | c2 B AGF | B3 G2 E | FGA B2 B | B2 G A2 B | c2 B AGF | B3 G2 E | FGA B2 || F | 
 e2 c d2 B | c2 A F2 B | G2 E F2 D | E2 F G2 A | BAG F2 d | cBc B2 B | BAG F2 d | cBc B2 ||  