ask for such halo css animation
Animation is not limited to static styles.
background: -webkit-radial-gradient(
rgba(255,0,0,1) 0px,
rgba(255,0,0,1) 10px,
rgba(255,0,0,.8) 10px,
rgba(255,0,0,.6) 20px,
rgba(255,0,0,1) 20px,
rgba(255,0,0,1) 22px,
rgba(255,0,0,.7) 22px,
rgba(255,0,0,.7) 60px,
rgba(255,0,0,1) 60px,
rgba(255,0,0,1) 62px,
rgba(255,0,0,.7) 62px,
rgba(255,0,0,.5) 100px,
rgba(255,0,0,1) 100px,
rgba(255,0,0,1) 102px,
rgba(255,0,0,.3) 102px,
rgba(255,0,0,.3) 110px,
rgba(255,0,0,1) 110px,
rgba(255,0,0,1) 112px,
rgba(255,0,0,.3) 112px,
white 120px,
white);https://jsfiddle.net/3L6q0w5L/
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
.common {
display: flex;
align-items: center;
justify-content: center;
border-radius: 50%;
border: 1px solid red;
}
.one {
-moz-animation: sunny 10s linear infinite;
-ms-animation: sunny 10s linear infinite;
-webkit-animation: sunny 10s linear infinite;
animation: sunny 10s linear infinite;
width: 200px;
height: 200px;
box-shadow: 0 0 20px 5px blue;
}
.two {
width: 80%;
height: 80%;
box-shadow: 0 0 20px 5px blue;
}
.three {
width: 60%;
height: 60%;
box-shadow: 0 0 20px 8px blue;
}
.four {
width: 40%;
height: 40%;
box-shadow: 0 0 20px 5px blue;
}
.five {
width: 20%;
height: 20%;
background-color: red;
box-shadow: 0 0 20px 5px blue;
}
@-webkit-keyframes sunny {
0% {
width: 200px;
height: 200px;
}
50% {
width: 100px;
height: 100px;
}
100%{
width: 200px;
height: 200px;
}
}
@keyframes sunny {
0% {
width: 200px;
height: 200px;
}
50% {
width: 100px;
height: 100px;
}
100%{
width: 200px;
height: 200px;
}
}
</style>
</head>
<body>
<div class="one common">
<div class="two common">
<div class="three common">
<div class="four common">
<div class="five common"></div>
</div>
</div>
</div>
</div>
</body>
</html>try it?
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