Border-style Css Codepen Type | Border Animation Pink And Green Html Css Code

  <!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>Document</title>
    <style>
        body {
            margin: 0;
            padding: 0;
            min-height: 100vh;
            font-family: sans-serif;
            -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
        }

        .hero {
            min-height: 100vh;
            width: 100%;
            background: #1b1b1b;


            position: absolute;

        }

        div {
            box-sizing: border-box;
        }

        /*main box*/
        .main-box {
            width: 320px;
            height: 480px;
            position: relative;
            margin: 6% auto;
            background: #1b1b1b;
            display: flex;
            justify-content: center;
            align-items: center;
            overflow: hidden;
        }

        .sp {
            position: absolute;
            transition: 0.5s;
        }

        .sp-t {
            top: 0;
            right: 0;
            width: 200px;
            height: 2px;
            background: linear-gradient(to left, transparent, #ff00aa, #00ff22);
            animation: anim2 2s linear infinite;
            transform: translateY(-300%);
            animation-delay: 0.8s;
        }

        .sp-r {
            bottom: 0;
            right: 0;
            width: 2px;
            height: 200px;
            background: linear-gradient(to top, transparent, #00ff4c, #ff0095);
            animation: anim1 2s linear infinite;
            animation-delay: 0s;
        }

        .sp-b {
            right: 0;
            bottom: 0;
            width: 200px;
            height: 2px;
            background: linear-gradient(to left, transparent, #01ff4d, #ff009d);
            animation: anim2 2s linear infinite;
        }

        .sp-l {
            left: 0;
            top: 0;
            width: 2px;
            height: 200px;
            background: linear-gradient(to top, transparent, #ff0062, #01ff4d);
            animation: anim1 2s linear infinite;
            animation-delay: 1s;
            transform: translateX(-300%);
        }

        @keyframes anim1 {
            0% {
                transform: translateY(300%);

            }

            100% {
                transform: translateY(-300%);

            }
        }

        @keyframes anim2 {
            0% {
                transform: translateX(300%);
            }

            100% {
                transform: translateX(-300%);

            }
        }

        /*main box end*/

        .form-box {
            width: 316px;
            height: 476px;
            position: relative;
            background: #252525;
            padding: 5px;
            overflow: hidden;
            z-index: 5;
        }
    </style>
</head>

<body>

    <div class="hero">
        <div class="main-box">
            <div class="form-box">
                <div id="after"></div>
            </div>
            <span class="sp sp-t"></span>
            <span class="sp sp-r"></span>
            <span class="sp sp-b"></span>
            <span class="sp sp-l"></span>
        </div>
    </div>


</body>


</html>

<!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>Document</title>
    <style>
        body {
            margin: 0;
            padding: 0;
            min-height: 100vh;
            font-family: sans-serif;
            -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
        }

        .hero {
            min-height: 100vh;
            width: 100%;
            background: #1b1b1b;
            position: absolute;

        }

        div {
            box-sizing: border-box;
        }

        /*main box*/
        .main-box {
            width: 320px;
            height: 480px;
            position: relative;
            margin: 6% auto;
            background: #1b1b1b;
            display: flex;
            justify-content: center;
            align-items: center;
            overflow: hidden;
        }

        .sp {
            position: absolute;
            transition: 0.5s;
        }

        .sp-t {
            top: 0;
            right: 0;
            width: 200px;
            height: 2px;
            background: linear-gradient(to left, transparent, #ff00aa, #00ff22);
            animation: anim2 2s linear infinite;
            transform: translateY(-300%);
            animation-delay: 0.8s;
        }

        .sp-r {
            bottom: 0;
            right: 0;
            width: 2px;
            height: 200px;
            background: linear-gradient(to top, transparent, #00ff4c, #ff0095);
            animation: anim1 2s linear infinite;
            animation-delay: 0s;
        }

        .sp-b {
            right: 0;
            bottom: 0;
            width: 200px;
            height: 2px;
            background: linear-gradient(to left, transparent, #01ff4d, #ff009d);
            animation: anim2 2s linear infinite;
        }

        .sp-l {
            left: 0;
            top: 0;
            width: 2px;
            height: 200px;
            background: linear-gradient(to top, transparent, #ff0062, #01ff4d);
            animation: anim1 2s linear infinite;
            animation-delay: 1s;
            transform: translateX(-300%);
        }

        @keyframes anim1 {
            0% {
                transform: translateY(300%);

            }

            100% {
                transform: translateY(-300%);

            }
        }

        @keyframes anim2 {
            0% {
                transform: translateX(300%);
            }

            100% {
                transform: translateX(-300%);

            }
        }

        /*main box end*/

        .form-box {
            width: 316px;
            height: 476px;
            position: relative;
            background: #252525;
            padding: 5px;
            overflow: hidden;
            z-index: 5;
        }
    </style>
</head>

<body>
    <div class="hero">
        <div class="main-box">
            <div class="form-box">
                <div id="after"></div>
            </div>
            <span class="sp sp-t"></span>
            <span class="sp sp-r"></span>
            <span class="sp sp-b"></span>
            <span class="sp sp-l"></span>
        </div>
    </div>
</body>
</html>