Er, you’re not even getting the name right. introns, not “interons.”
Also, I have no idea what you think you’re talking about anyway, since all of our DNA is “left over” from our evolution. Introns can simply be the results of mutations, sure, and can also be selected for as providing alternate splice sites. But overall, it might be best if you have a better idea of what the science is, before you try to discuss parts of it being incorrect. At least ask some questions. Like, of people who know what they’re talking about, not creationists.