Confused about pumping Lemma, what am I missing?

When I apply pumping slogan in this language:
$ {L = {010 ^ n: n ge0 }} $ about the alphabet $ { Sigma = {0,1 }} $ I understand that it is not regular despite the fact that it is regular.

  1. leave $ {n = 4} $, so $ w = 010000 $
  2. $ w = xyz $ , $ { mid xy mid leq n} $ Y $ { mid and mid geq 1} $
  3. $ x = 0 $ , $ y = 10 $ , $ z = 000 $
  4. leave $ i = 2 $
  5. $ xy ^ 2z = 01010000 $ $ no in L $ so L is not regular.

So, what am I missing?