JSFiddle - React, Tailwind, and code Playground

JavaScript

$(function changeBG() {
            var colors = [""];
             
            setInterval(function changeBG() { 
                var bodybgarrayno = Math.floor(Math.random() * colors.length);
                var selectedcolor = colors[bodybgarrayno];
                $("body").css("background",selectedcolor);
            }, 3000);
        })