h1 {color: red; 
background: #D9E248;
text-align: center; margin: 0}
a {color: RED}
html {background: #10743C}
body {width: 900px; margin: 15px auto; background: #87BA38}
#king{margin: 15px}
nav {background: lightgreen; text-align: center;}
nav a {margin: 20px; text-decoration: none; color: red; font: 17px Sans}
nav a:hover {color: grey;