JSFiddle - React, Tailwind, and code Playground

HTML

<iframe src=""></iframe>

JavaScript

var urls = ["http://www.howstuffworks.com", "http://example.com"];
var i = urls.length;

function redirect_url(){
    if( i >= 0 ){
        setTimeout(function(){
            $('iframe').attr('src', urls[i]);
            i--;
            redirect_url();
        }, 3000);
    }
}

redirect_url();