li {
    display: inline;
}
a {
    display: block;
    padding: 8px;
    background-color: #dddddd;
}

li a {
    display: block;
    color: green;
}
p {
    border-left: 6px solid red;
    background-color: lightgrey;
ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: #333;
}