body{
    font-family: arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color:rgb(164, 41, 247);
    }
    header{
        background-color : red;
        color: green;
        text-align: center;
        padding: 20px;
    }
    nav ul {
        list-style: none;
        padding: 0;
        background-color: yellow;
        text-align: center;
    }