.container1 {
    position: relative;
    color:red;
}

.centered {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
}
.centered2 {
    position: absolute;
    top:50px;
    left:50%;
    transform: translateX(-50%);
}
.quizButton {
    position:absolute;
    top:500px;
    left:50%;
    transform:translateX(-50%);
    background-color: black;
    border: 0;
    color: #fefbef;
    font-family: 'Open Sans', sans-serif;
    font-weight: 1200;
    line-height: 24;
    margin-top: 1.5rem;
    width: 100%; 
}
body {
    background-color: orange;
}