body {
    padding: 0;
    margin: 0;
}


h1 {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.startButto  {
    background-color: rgb(21, 100, 204);
    border: none;
    border-radius: 25px;
    font-size: 30px;
    padding: 10px;
    transition: scale 0.5s ease;
}





.scale {
    scale: 0.5;
}
.scale3 {
    scale: 1;
}


.scale2 {
    scale: 1.5;
}