JSFiddle - React, Tailwind, and code Playground

HTML

<div id="background">
<pre>
+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
|         |         |         |         |         |         |         |         |         |         |
|         |         |         |         |         |         |         |         |         |         |
|         |         |         |         |         |         |         |         |         |         |
|         |         |         |         |         |         |         |         |         |         |
+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
|         |         |         |         |         |         |         |         |         |         |
|         |         |         |         |         |         |         |         |         |         |
|         |         |         |         |         |         |         |         |         |         |
|         |         |         |         |         |         |         |         |         |         |
+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
|         |         |         |         |         |         |         |         |         |         |
|         |         |         |         |         |         |         |         |         |         |
|         |         |         |         |         |         |         |         |         |         |
|         |         |         |         |         |         |         |         |         |         |
+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
|         |         |         |         |         |         |         |         |         |         |
|         |         |         |         |         |         |         |         |         |         |
|         |         |         |         |         |         |         |         |         |         |
|         |         |         |...

CSS

body{
    background:black;
    color:green;

}
#background{
    position:absolute;
    top:0px;
    left:0px;
    z-index:-1;
    -webkit-user-select: none; /* Chrome/Safari */        
    -moz-user-select: none; /* Firefox */
    -ms-user-select: none; /* IE10+ */
    /* Rules below not implemented in browsers yet */
    -o-user-select: none;
    user-select: none;
    cursor:default;
}
#content{
    color:red;
    font-family: Courier;
}