This Bible contradiction is from the EvilBible.com.
Because of man's wickedness God destroys him
Genesis 6:5 View context
And GOD saw that the wickedness of man [was] great in the earth, and [that] every imagination of the thoughts of his heart [was] only evil continually.
Genesis 6:7 View context
And the LORD said, I will destroy man whom I have created from the face of the earth; both man, and beast, and the creeping thing, and the fowls of the air; for it repenteth me that I have made them.
Because of man's wickedness God will not destroy him
Genesis 8:21 View context
And the LORD smelled a sweet savour; and the LORD said in his heart, I will not again curse the ground any more for man's sake; for the imagination of man's heart [is] evil from his youth; neither will I again smite any more every thing living, as I have done.