Design a musical arrangement using the alphabetical representation of the given sequence and the supplied motif.
X:1
L:1/8
Q:1/8=180
M:12/8
K:G
['', 'B2 B cBc d2', 'ABc def g3']  
X:1
L:1/8
Q:1/8=180
M:12/8
K:G
 GA |: B2 B cBc d2 d d2 e | dBG dBG ABc AGA | B2 B cBc d2 B d2 g |1 fed cBA G3 G2 A :|2 
 fed cBA G3 GBd || g2 d B2 g f2 d B2 c | ded c2 A d3 B2 d | g2 d B2 g f2 d BcB |1 
 ABc def g3 g2 f :|2 ABc def g3 g3 |]  