You can utilize Javascript to achieve this functionality. By inserting a script that includes a time out function, you can automatically hide the designated div element after a specified duration.
<html>
<head></head>
<body>
<div class="LOADING" id="LOADING" name="LOADING"></div>
<div class="HOME_MENU" id="HOME_MENU" name="HOME_MENU"></div>
<script>
// Accessing the desired element by its unique id using javascript
var divElement = document.getElementById('LOADING');
// Implementing a time delay of 10 seconds (10000 milliseconds) before executing the function to hide the element
setTimeOut(function () {
// Concealing the divElement from view. There are multiple approaches to achieve this. For simplicity, we will set its display property to 'none'
divElement.style.display = 'none'
}, 10000);
</script>
</body>
</html>