Untitled

<html>

<head>
    <style>
    #overlay{
    display:none;
    background:dodgerblue;
    width: 100%;
 }

 html, body {margin:0;padding:0;height:100%;}


    </style>
        <script src="jquery-3.3.1.min.js"></script>

<script>$('#overlay').fadeIn('fast').delay(1000).fadeOut('fast');
</script>
</head>
<body>
<div id ="logo-overlay">Logo here</div>
</body>
</html>