body{
background-color:black;
color:white;
}
a {
color:yellow;
}
#f{
font-size:35px;
}
ul{
list-style-type: none;
margin: 0;
padding: 0;
}
li{
float:left;
}
a:link, a:visited{
display: block;
color:white;
background-color:green;
width:125px;
text-align:center;
text-decoration:none;
}
a:hover{
color:purple;
background-color:white;
}