头像闪光特效

<style>
    .avatar {
        border-radius: 50%;
        animation: light 4s ease-in-out infinite;
        transition: 0.5s;
    }
    .avatar:hover {
        transform: scale(1.15) rotate(720deg);
    }
    @keyframes light {
        0%{box-shadow: 0 0 4px #f00;}
        25%{box-shadow: 0 0 16px #0f0;}
        50%{box-shadow: 0 0 4px #00f;}
        75%{box-shadow: 0 0 16px #0f0;}
        100%{box-shadow: 0 0 4px #f00;}
    }
</style>
<h1 class="avatar">我是头像</h1>