Denevola의 샌드박스 포털(초호기) » Neon Animation
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#header #header-extra-div-1 { animation: neon 1s ease-out infinite alternate; width: 140px; height: 140px; border-radius: 50%; background-position: center; } @keyframes neon { from { box-shadow: 0 0 10px white } to { box-shadow: none; opacity: .5; } }