Horizontal Loading Bar Animation

<!DOCTYPE html>
<html lang="en">
<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>Horizontal Loading Bar Animation</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }

        body {
            background-color: #292929;
        }

        section {
            display: flex;
            width: 100%;
            height: 100vh;
            justify-content: center;
            align-items: center;
        }

        ul#loadingBar {
            width: 300px;
            list-style: none;
        }

        ul#loadingBar li {
            width: 5%;
            height: 5px;
            background-color: rgba(255,255,255,0.5);
            margin: 20px 0;
            border-radius: 20px;
            animation: loader 5s linear infinite;
        }

        ul#loadingBar li:nth-child(1) {
            animation-delay: 0.3s;
        }

        ul#loadingBar li:nth-child(2) {
            animation-delay: 0.5s;
        }

        ul#loadingBar li:nth-child(3) {
            animation-delay: 0.8s;
        }

        ul#loadingBar li:nth-child(4) {
            animation-delay: 0.2s;
        }

        ul#loadingBar li:nth-child(5) {
            animation-delay: 0.9s;
        }

        ul#loadingBar li:nth-child(6) {
            animation-delay: 0.1s;
        }

        ul#loadingBar li:nth-child(7) {
            animation-delay: 0.8s;
        }

        ul#loadingBar li:nth-child(8) {
            animation-delay: 0.4s;
        }

        @keyframes loader {
            0% {
                width: 10%;
            }

            30% {
                width: 70%;
            }

            50% {
                width: 30%;
            }

            65% {
                width: 90%;
            }

            85% {
                width: 100%;
                background-color: rgba(250,121,0,0.5);
            }

            100% {
                width: 5%;
            }
        }
        
    </style>
</head>
<body>
    <section>
        <ul id="loadingBar">
            <li></li>
            <li></li>
            <li></li>
            <li></li>
            <li></li>
            <li></li>
            <li></li>
            <li></li>
        </ul>
    </section>
</body>
</html>

Result Screenshot(s)

Horizontal Loading Bar AnimationWorking Sample0