like zaber04 said, we need to set up an array starting from 0 to a certain number to see the pattern. The following is the code I use to set up the array and observe the pattern:

result = 0
further_xor = 0
print(0, "\t", result)
for i in range(1, 40):
  result = result ^ i
  further_xor = further_xor ^ result

  print(i, "\t", result, "\t", further_xor)