    <!DOCTYPE html>
    <html>
    <head>
      <meta charset="UTF-8">
      <title>문자열 회전시키기</title>
      <link rel="stylesheet" href="style_js.css">
      <style>
        #rotate {
          font-size: 40px;
          color: blue;
        }
      </style>
    </head>
    <body style="text-align: center">
      <h1 id="rotate">Programming</h1>
      <script>
        const rotate = document.getElementById("rotate");
        function rotateString() {
          const text = rotate.textContent;
          const firstChar = text[0];
          const rotatedText = text.slice(1) + firstChar;
          rotate.textContent = rotatedText;
        };
        setInterval(rotateString, 500); // 500ms마다 문자열을 회전
      </script>
    </body>
    </html>