diff --git a/Day-16/index.html b/Day-16/index.html
new file mode 100644
index 0000000..869db4a
--- /dev/null
+++ b/Day-16/index.html
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Pop Up</title>
+    <link rel="stylesheet" href="style.css">
+</head>
+
+<body>
+    <div class="container">
+        <button type="submit" class="btn" onclick="popupOpen()">Submit</button>
+        <div class="popup" id="popup">
+            <i class="fa-solid fa-4x fa-circle-check" style="color: #002aff;"></i>
+            <h2>Thank You!</h2>
+            <p>Successfully Submitted</p>
+            <button type="button" onclick='popupClose()'>OK</button>
+        </div>
+
+    </div>
+    <script src="https://kit.fontawesome.com/bbe6f2c2c3.js" crossorigin="anonymous"></script>
+    <script>
+        let popup = document.getElementById("popup")
+        function popupOpen() {
+            popup.classList.add('open-popup')
+
+        }
+        function popupClose() {
+            popup.classList.remove('open-popup')
+
+        }
+
+    </script>
+
+</body>
+
+</html>
\ No newline at end of file
diff --git a/Day-16/style.css b/Day-16/style.css
new file mode 100644
index 0000000..fdc2052
--- /dev/null
+++ b/Day-16/style.css
@@ -0,0 +1,67 @@
+* {
+    margin: 0;
+    padding: 0;
+    box-sizing: border-box;
+}
+
+.container {
+    width: 100%;
+    height: 100vh;
+    display: flex;
+    background-color: antiquewhite;
+    align-items: center;
+    justify-content: center;
+}
+
+.btn {
+    padding: 12px 24px;
+    border-radius: 10px;
+    border: none;
+    outline: none;
+    font-size: 22px;
+    background-color: blue;
+    color: white;
+    cursor: pointer;
+}
+
+.popup {
+    visibility: hidden;
+    width: 300px;
+    background-color: white;
+    border-radius: 5px;
+    position: absolute;
+    top: 0%;
+    left: 50%;
+    transform: translate(-50%, -50%) scale(0.1);
+    text-align: center;
+    padding: 0 30px 30px;
+    transition: transform 0.4s, top 0.4s;
+}
+
+.open-popup {
+    visibility: visible;
+    top: 50%;
+    transform: translate(-50%, -50%) scale(1);
+}
+
+i {
+    margin-top: -50px;
+}
+
+h2 {
+    font-size: 38px;
+    margin: 30px 0 10px;
+}
+
+.popup button {
+    width: 100%;
+    margin-top: 50px;
+    padding: 10px 0;
+    border: none;
+    outline: none;
+    border-radius: 4px;
+    cursor: pointer;
+    color: white;
+    box-shadow: 5px 5px 5px rgba(0, 0, 0, 1);
+    background-color: rgb(110, 131, 247);
+}
\ No newline at end of file
