<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
body {
margin: 0px;
background: #fca701;
display: flex;
align-items: center;
justify-content: center;
height: 100vh;
}
.traffic-light {
position: relative;
background: #222;
border-radius: 10px;
padding: 16px;
box-shadow: inset 0 0 0px 5px #2a2a2a;
}
.light-red,
.light-yellow,
.light-green {
position: relative;
margin: 16px;
width: 100px;
height: 100px;
border-radius: 50%;
background: repeating-linear-gradient(#333, #443 5px);
animation-duration: 4s;
animation-iteration-count: infinite;
animation-timing-function: step-end;
}
.light-red {
animation-name: lightUpRed;
}
.light-yellow {
animation-name: lightUpYellow;
}
.light-green {
animation-name: lightUpGreen;
}
@keyframes lightUpRed {
0% {
background: repeating-linear-gradient(#f00, #e00 5px);
box-shadow: 0 0 40px #f00;
z-index: 1;
}
35% {
background: repeating-linear-gradient(#443, #333 5px);
box-shadow: none;
z-index: 0;
}
}
@keyframes lightUpYellow {
80% {
background: repeating-linear-gradient(#fd0, #ec0 5px);
box-shadow: 0 0 40px #fd0;
z-index: 1;
}
}
@keyframes lightUpGreen {
35% {
background: repeating-linear-gradient(#0d0, #0c0 5px);
box-shadow: 0 0 40px #0d0;
z-index: 1;
}
80% {
background: repeating-linear-gradient(#443, #333 5px);
box-shadow: none;
z-index: 0;
}
}
.protector {
width: 100%;
position: absolute;
top: 25px;
left: 50%;
transform: translateX(-50%);
border-right: solid 30px transparent;
border-left: solid 30px transparent;
border-top: solid 100px #191919;
border-radius: 11px;
z-index: -1;
}
.protector:nth-child(2) {
top: 142px;
}
.protector:nth-child(3) {
top: 257px;
}
</style>
</head>
<body>
<div class="traffic-light">
<div class="protector"></div>
<div class="protector"></div>
<div class="protector"></div>
<div class="light-red"></div>
<div class="light-yellow"></div>
<div class="light-green"></div>
</div>
</body>
</html>
