body{
    display: flex;
    justify-content: center;
    flex-direction: column;
}

h1 {
    font-size: 10rem;
    margin: auto;
}

p {
    font-size: 5rem;
    margin: auto;
    padding-bottom: 100px;
}

div {
    height: 200px;
    width: 200px;
    margin: auto;
    background-color: limegreen;
    animation: animatie 10s 5s ease-in-out;
    animation-iteration-count: infinite;
}

@keyframes animatie {
    from {
        background-color: limegreen;
    }
    50% {
        background-color: rgb(55, 0, 255);
        border-radius: 500px;
    }
    to {
        border-radius: 0px;
        background-color: red;
    }
}