#header {
    background-color:blue;
    color:white;
    text-align:center;
    padding:5px;
}
#nav {
    line-height:30px;
  
    background-color:lightblue;
    height:1000px;
    width:100px;
    float:right;
    padding:45px; 
}
#section {
    width:350px;
    float:left;
    padding:10px; 
}
footer {
  position: fixed;
  bottom: 0;
  left: 0;
  height: 70px;
  background-color: blue;
  width: 100%;