/* Using built-in type */
body {
    background: yellow;
}
h1 {
    background: red;
}
/* Using an id name 'links'. # means id. */
#links {
    font-size: 75%;
    text-align: right;
}
/* Using a class name 'welcome'. a (.) period means class. */
.welcome {
    color: blue;
}