<!DOCTYPE html>
<html>
<head>
<title>Rotating Square</title>
<style>
    #square {
        width: 100px;
        height: 100px;
        background-color: red;
        position: absolute;
    }
</style>
</head>
<body>
<div id="square"></div>

<script>
    let angle = 0;

    function rotateSquare() {
        angle += 1;
        let square = document.getElementById('square');
        square.style.transform = `rotate(${angle}deg)`;
        requestAnimationFrame(rotateSquare);
    }

    rotateSquare();
</script>
</body>
</html>