shanshuo.html 514 Bytes

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
<style>
    .role{
        width: 20px;
        height: 20px;
        background-color: red;
        border-radius: 50%;
        animation: twinkle 1s infinite;
        -webkit-animation: twinkle 1s infinite;
    }
    @-webkit-keyframes twinkle{
    0%{
        opacity:0;
    }
    50%{
        opacity:1;
    }
    100%{
        opacity:0;
    }
}
</style>
</head>
<body>
    <div class="role"></div>
</body>
</html>