JSFiddle - React, Tailwind, and code Playground

HTML

<html>
<head>
</head>  
<body>
    <div id="header">
    </div>   
</body
</html>

CSS

#header{
    width: 100%;
    height: 100px;
    background-color: #333333;
    text-align: center;
    color: #FFFFFF;
}

JavaScript

var myTxt = new Array(
    "1111 111 111 11 111 111",
    "2 22 22 2222 2222 22",
    "333 33 33333 3333 333 333",
    "4 444 444 4444 4444 44444",
    "555 555 55 55 55 55 555 5"
    
);
randnm=Math.round(Math.random()*(myTxt.length-1));

document.getElementById("header").innerHTML = myTxt[randnm];