<html>
<head>
    <style>
        .box {
            margin: 10px;
            height: 200px;
            width: 200px;
            border: 1px solid black;
            float: left;
        }
    </style>
</head>
<body>
    <p>All boxes should look the same.</p>
    <div class="box" style="background-image: conic-gradient(green, 25%, transparent 0deg)"></div>
    <div class="box" style="background-image: conic-gradient(green, 90deg, transparent 0)"></div>
    <div class="box" style="background-image: conic-gradient(green, calc(1 * 100% / 4), transparent 0)"></div>
    <div class="box" style="background-image: conic-gradient(green, calc(360deg / 4), transparent 0deg)"></div>
</body>
</html>
