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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>CSS Pulsing Animation</title>
<link rel="stylesheet" type="text/css" href="style.css">
</head>
<body>
<div class="pulse">
<span style="--i:1;"></span>
<span style="--i:2;"></span>
<span style="--i:3;"></span>
<span style="--i:4;"></span>
<span style="--i:5;"></span>
<span style="--i:6;"></span>
</div>
</body>
</html>
*
{
margin: 0;
padding: 0;
box-sizing: border-box;
}
body
{
display: flex;
justify-content: center;
align-items: center;
min-height: 100vh;
background: #0a3643;
}
.pulse
{
position: relative;
width: 200px;
height: 200px;
box-shadow: inset 0 0 40px #12b9ff,
0 0 50px #12b9ff;
border-radius: 50%;
border: 1px solid #12b9ff;
background: url(earth.png);
background-size: cover;
animation: animateEarth 10s linear infinite;
}
.pulse span
{
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%,-50%);
background: transparent;
border: 1px solid #12b9ff;
animation: animate 6s linear infinite;
animation-delay: calc(var(--i) * -1s);
border-radius: 50%;
}
@keyframes animate
{
0%
{
width: 200px;
height: 200px;
opacity: 1;
}
50%
{
opacity: 1;
}
100%
{
width: 600px;
height: 600px;
opacity: 0;
}
}
@keyframes animateEarth
{
0%
{
background-position-x: 0px;
}
100%
{
background-position-x: 360px;
}
}
