Testing keyframes
{"view":"split-vertical","fontsize":"100","seethrough":"","prefixfree":"1","page":"css"}
// alert('Hello world!');
<!-- content to be placed inside <body>…</body> -->
<div></div>
/**
* Testing keyframes
*/
div {
width: 40px; height: 40px;
background: red;
animation: red-black infinite .5s linear;
}
@keyframes red-black {
from { background: red}
to { background: black; }
}