console 命令行工具 X clear

console

<div></div>

div {
    width: 100px;
    height: 100px;
    border: 3px solid #000;
    border-radius: 10px;
    -webkit-mask: conic-gradient(from -90deg at 40px 40px, red 90deg, transparent 0deg);
    -webkit-mask-position: -20px -20px;
}