<div id=”testPopup” style=”position: fixed; top: 50%; left: 50%; transform: translate(-50%, -50%); background: white; padding: 20px; border: 2px solid red; z-index: 9999;”> <h2>TEST POPUP – If you see this, it’s working!</h2> <button onclick=”document.getElementById(‘testPopup’).style.display=’none'”>Close</button> </div> <script> setTimeout(function() { alert(‘This should show after 3 seconds’); }, 3000); </script>