JSFiddle - React, Tailwind, and code Playground

by p4bl1t0

HTML

<body>
</body>

CSS

body
{
    
}

JavaScript

var fondos = ["http://placekitten.com/g/200/300","http://placedog.com/g/400/300"];
var fondoSeleccionado = "http://placekitten.com/g/200/300";

function changeBG (){
    for (var i = 0; i < fondos.length; i = i + 1){
        if(fondos[i] === fondoSeleccionado){
            if(i === (fondos.length - 1)){
                fondoSeleccionado = fondos[0];
                break;
            }
            else{
                fondoSeleccionado = fondos[i + 1];
                break;
            }
        }
    }
    $('body').css('background','url("'+fondoSeleccionado+'") repeat').append('<p>Cambio</p>');
    
}
function iterante(){
    changeBG();
    var f = function(){ iterante();};
    setTimeout(f,2000);
}
iterante();