body {
    font-family: Cambria, Cochin, Georgia, Times, 'Times New Roman', serif;
    margin: 20px;
    background-color:cornsilk;
}
h1 {
    color: chartreuse;
}
p {
    color: blue;
}
#demo {
    font-size: 18px;
    margin-top: 10px;
    color: red;
    font-weight: bold;
}