main{
    width:70%;
}
img{
    height:30%;
    width:40%;
    float:left;
    margin:0em 4em 0em 4em;
}
header{
    background-image:url("https://codehs.com/uploads/b21358e4c0b83b34197185c522f7e702");
    background-position:fixed;
    background-size:100% 100%;
    height:3em;
    padding:3em;
    color:white;
}
footer{
    padding:2em;
    margin-top:75%;
    font-size:10px;
    background-color:lightgray;
}