h1{
color:blue;font-size:200%;
}
div{
width:640px;
margin-left:auto;
margin-right:auto;
border-top:solid 1px blue;
}
header
{
width:640px;
margin-left:auto;
margin-right:auto;
border-top:solid 5px blue;
border-bottom:solid 5px blue;
font-size:200%;
}
footer
{
width:640px;
margin-left:auto;
margin-right:auto;
border-top:solid 3px blue;
font-size:100%;
text-align:center;
}
li{
list-style:square
}