Design a musical arrangement using the alphabetical representation of the given sequence and the supplied motif.
X:1
L:1/8
M:3/8
K:C
['g2 e/f/', 'g d/g/fe dec de/f/g d2 g a/g/fe', 'BGA/B/ cB/c/d/e/ d/e/fe cd/e/d/B/']  
X:1
L:1/8
M:3/8
K:C
 g2 e/f/ | g2 e/f/ | gfe | d3 | def | g>ag | fed |1 e c2 :|2 c2 c |: de/f/g | d2 g | d/g/fe | dec | 
 de/f/g | d2 g | a/g/fe |1 d2 c :|2 d2 G |: cd/e/f/e/ | dde | cd/e/d/c/ | BGA/B/ | cB/c/d/e/ | 
 d/e/fe | cd/e/d/B/ | c3 :|  