body {
    background-color: black;
}

#zonda {
    width: 240;
    height: 150;
}

h1 {color: yellow; 
    text-align: center;
    background-color: blue;
}


#code {
    color: blue; 
    font-size: 25px;
    text-align: center; 
}

#noschool {
     
    font-size: 25px;
    text-align: center; 
}

#bookmark {
    text-align: center;
}

.center {
    display: block;
    margin-left: auto;
    margin-right: auto;
    width: 50%;
}