header{
    background-color: #ff0000;
    width: 100%;
    padding: 5%;
    text-align: center;
    font-size: 40px;
    color: #ffffff;
    font-family: 'Courier New', Courier, monospace;
    border: solid 5px #000000;
}
nav{
    background-color: #ffff00;
    width: 100%;
    padding: 10px;
    text-align: center;
    font-family: 'Courier New', Courier, monospace;
}
li{
    margin-left: 20px;
    list-style: none;
    display: inline;
    padding: 10px;
}
aside{
    background-color: #0000ff;
    width: 30%;
    height: 300px;
    font-family: 'Courier New', Courier, monospace;
    float: right;
}
section{
    background-color: #008000;
    width: 70%;
    height: 150px;
    font-family: 'Courier New', Courier, monospace;
    float: left;
}
article{
    background-color: black;
    color: #ffffff;
    width: 70%;
    height: 150px;
    float: left;
}
footer{
    padding: 30px;
    background-color: #8a2be2;
}