Cambiar las fotos de Genbeta por fotos de gatitos

gatitos.js

    var imagenes = document.querySelectorAll('.article-home-figure img');
    var imagenesLog = [];
    for(var i = 0; i < imagenes.length; i++){
        var url = document.querySelectorAll('.article-home-figure img')[i].src;
        var ancho = document.querySelectorAll('.article-home-figure img')[i].width;
        var alto = document.querySelectorAll('.article-home-figure img')[i].height;
        var sustituto = "http://lorempixel.com/"+ancho+"/"+alto+"/cats";
        var datos = [url, ancho, alto, sustituto]
        imagenesLog.push(datos);
        document.querySelectorAll('.article-home-figure img')[i].src = sustituto;
        document.querySelectorAll('.article-home-figure img')[i].srcset = sustituto +" "+ancho+"w", sustituto +" "+ancho+"w";
    }