p
{
    background-color:grey;
    text-align:center;
    word-spacing:3em;
    font-size:3em;
}

button {
    display: block;
    margin-left: auto;
    margin-right: auto;
    width: 5em;
    text-align: center;
    font-family: white;
    font-size: 3em;
    text-decoration: none;
    color: white;
    background-color: green;
}