Design a musical arrangement using the alphabetical representation of the given sequence and the supplied motif.
X:1
L:1/8
Q:1/4=120
M:2/2
K:D
['a2 f/g/a g2 e/f/g fdAf ec A2']  
X:1
L:1/8
Q:1/4=120
M:2/2
K:D
 a2 f/g/a g2 e/f/g | fdAf ec A2 | dAfd afbg | f/g/a Ac d2 D2 |:  