index.html
<!DOCTYPE html>
<html lang="ja">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>My Animation</title>
<link rel="stylesheet" href="style.css">
</head>
<body>
<div class="loading"></div>
</body>
</html>style.css
@charset "utf-8";
.loading{
width: 32px;
height: 32px;
border-top: 8px solid red;
border-right: 8px solid blue;
border-bottom: 8px solid green;
border-left: 8px solid yellow;
border-radius: 50%;
animation: spin 800ms infinite linear;
/*animation-timing-function: linear;*/
}
@keyframes spin {
100%{
transform: rotate(360deg);
}
}