#blue {color: blue;} /*same as h1#blue, unique name*/
h1 { /*all element h1 --> selector*/
font-family: courier;
font-size: 160%;
}
.red {color: red;} /*same as p.red */
p.myborder {
border: 1px solid powderblue;
padding: 30px;
}
p#mymargin{ /*same as #margin */
border: 1px solid powderblue;
margin: 10px;
}