purple spotting over galaxy note 5 screen

A

AC Question

just bought my galaxy note 5 yesterday and today in the morning i noticed purple spots all over the front screen. looks like its leaking or something. device is used never dropped or anything like i mentioned it was boughten yesterday, could it be a samsung company issue?
i have at&t and idk if they will want to replace it, like i just said no physical damage was done so im kind of confused as to why those spots appeared