Construct a musical arrangement that blends the supplied motif while maintaining the specified alphabetical order.
X:1
L:1/4
M:3/4
K:G
['B A']  
X:1
L:1/4
M:3/4
K:G
 G/B/4d/4 | g g f | e2 B/c/4d/4 | B A B | A G G | G2 z/ c/ | B A B/d/ | g g f/g/ | a2 g/f/ | 
 e d B | B2 z/ c/ | B A B/d/ | g g f/g/ | a2 g/f/ | e/d/ B B | A2 (3G/B/d/ | g g f | e2 B/c/4d/4 | 
 B A B | A G G | G2 ||  