/*External stylesheet aka pain*/
* {
    color: yellow;
}
header {
    text-align: center;
} 
section {
    margin: 1in;
    border: 3px solid yellow;
    padding: 20px;
}
body {
    background-image: url(Images/radiation.jpg);
}
center {
    text-align: center;
}

#sectionpresent {
    font-family: sans-serif;
}