JSFiddle - React, Tailwind, and code Playground

HTML

<body>
<div id="snowingScreen"></div>
</body>

CSS

body{
    background:#ccc;
}
    #snowingScreen {
        text-align:center;
        height:0;
        width:0;
    }
    html, body{
        margin:0;
        padding:0;
        overflow-y: auto;
        overflow-x:hidden;
    }
    .snow{
        color:white;
        width:10px;
        height:10px;
        z-index:999999999;
    }

    #bottom_image {
        position:relative;
        bottom:0px;
    }

JavaScript

//    window.setInterval(generateSnow, 0);

    var windowHeight = jQuery(document).height();

    var windowWidth = jQuery(window).width();
    function generateSnow() {
        for (i = 0; i < 4; i++) {
 var snowTop = Math.floor(Math.random() * (windowHeight));
            snowTop = 0;
           
            var snowLeft = Math.floor(Math.random() * (windowWidth - 2));
            var imageSize = Math.floor(Math.random() * 20);

            jQuery('body').append(
                    jQuery('<div />')
                    .addClass('snow')
                    .css('top', snowTop)
                    .css('left', snowLeft)
                    .css('position', 'absolute')
                    .html('*')
                    );


        }
    }
    function snowFalling() {
        jQuery('.snow').each(function(key, value) {
            if (parseInt(jQuery(this).css('top')) > windowHeight - 80) {
                jQuery(this).remove();

            }
            var fallingSpeed = Math.floor(Math.random() * 1 - 1);
            var movingDirection = Math.floor(Math.random() * 2);
            var currentTop = parseInt(jQuery(this).css('top'));
            var currentLeft = parseInt(jQuery(this).css('left'));
            jQuery(this).css('top', currentTop + fallingSpeed);
            if (movingDirection === 0) {
                jQuery(this).css('bottom', currentLeft + fallingSpeed);
            } else {
                jQuery(this).css('bottom', currentLeft + -(fallingSpeed));
            }
        });
    }
    window.setInterval(snowFalling, 15);
    window.setInterval(generateSnow, 1000);