console 命令行工具 X clear
console
<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
    <style>
        div {
            width: 250px;
            height: 250px;
            background-color: green;
            margin: 0;
            border-radius: 50%;
           
            animation: movediv 3s;
            animation-fill-mode: forwards;
        }

        
        @keyframes movediv {
            from {
                
            }
            to {
                margin-left: 300px;
                background-color: blue;
            }
        }
    </style>
</head>
<body>
    <div></div>
</body>
</html>