form: rotate(-10deg); /* Rotate left at 25% and 75% of the animation */
            }
            
            50% {
                transform: rotate(10deg); /* Rotate right at 50% of the animation */
            }
        }
    </style>
</head>
<body>
    <div>
        <button class="btn">Shake Me</button> <!-- Create a button with the "btn" class -->
    </div>
</body>
</html>

