h1 {background-color: black}
h1 {color: white}
h1 {text-align: center}
h1 {font-family: arial}
h1 {font-size: 120%}
h1.rightmargin{margin-right:25%}
body {background-color: black}
body {color: white}
body {font-family: arial}
body {font-size: 100%}
body {text-align: center}
body {margin-left: 25%}
body {margin-right: 25%}