style.css

<style>
    body {
        height: 100vh;
        text-align: center;
        font-family: Verdana, Geneva, Tahoma, sans-serif;
        background-color: #ffffff;
        opacity: 1;
        background-size: 36px 36px;
        background-image: repeating-linear-gradient(0deg, #bddcff, #bddcff 1.8px, #ffffff 1.8px, #ffffff);
    }
    
    hr {
        border: none;
        border-top: 10px dotted;
        color: black;
        background-color: none;
        height: 10px;
        width: 50%;
    }
    
    h1 {
        font-size: 90px;
        text-align: center;
        text-transform: capitalize;
        color: rgb(0, 0, 0);
        animation: bgchange 10s infinite;
    }
    
    h2 {
        text-align: center;
        color: rgb(255, 0, 0);
        font-size: 25px;
    }
    
    h3 {
        text-align: center;
        color: rgb(0, 0, 0);
    }
    
    h4 {
        text-align: center;
        font-size: 25px;
        color: rgb(255, 0, 0);
    }
    
    h5 {
        text-align: center;
        text-transform: capitalize;
        color: rgb(0, 0, 0);
    }
    
    span {
        text-align: justify;
        color: rgb(0, 0, 0);
    }
    
    @keyframes bgchange {
        0% {
            background-color: #ff0000
        }
        5% {
            background-color: rgb(255, 115, 0)
        }
        10% {
            background-color: rgb(255, 145, 71)
        }
        15% {
            background-color: rgb(255, 208, 0)
        }
        20% {
            background-color: rgb(255, 217, 0)
        }
        25% {
            background-color: #fffb00
        }
        30% {
            background-color: #d9ff00
        }
        35% {
            background-color: #91ff00
        }
        40% {
            background-color: #00ff15
        }
        45% {
            background-color: #00ff95
        }
        50% {
            background-color: #00ffd5
        }
        55% {
            background-color: rgb(0, 255, 242)
        }
        60% {
            background-color: rgb(71, 212, 255)
        }
        65% {
            background-color: rgb(0, 162, 255)
        }
        70% {
            background-color: rgb(0, 81, 255)
        }
        75% {
            background-color: #4c00ff
        }
        80% {
            background-color: #cc00ff
        }
        85% {
            background-color: #f700ff
        }
        90% {
            background-color: #ff009d
        }
        95% {
            background-color: #ff0022
        }
        100% {
            background-color: #ff0000
        }
    }
</style>