JSFiddle - React, Tailwind, and code Playground

HTML

<iframe width="100%" height="100%"></iframe>

JavaScript

var iframes = document.getElementsByTagName("iframe");
var i = 0;
window.setInterval(function(){
    if(i < iframes.length){
        iframes[i].src = "//example.com";
        i++;
    }
}, 3000);