Construct a musical arrangement using the specified alphabetical sequence and the given motif as a foundation.
X:1
L:1/8
Q:3/8=120
M:6/8
K:G
['B BcA G2 B c2 B A2', 'd2 d e2 f gfe d3 B2']  
X:1
L:1/8
Q:3/8=120
M:6/8
K:G
"^A" B | BcA G2 B | c2 B A2 d | d2 c Bcd | dcB A2 B | BcA G2 B | c2 B A2 d | d2 c Bcd | cBA G2 :| 
"^B" B | d2 d e2 f | gfe d3 | B2 B c2 d | edc B3 | d2 d e2 f | gfe d3 | B2 B c2 d | edc B2 d | 
 dcB ABc | cBA B2 d | dcB ABG | FGE D2 |]  