html,
body,
.circle {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: black;
}

.circle,
.circle::before,
.circle::after {
    border-width: 0.4em;
    border-style: solid;
    border-radius: 50%;
    border-left-color: transparent;
    border-right-color: transparent;
    animation: animate 4s ease-in-out infinite alternate;
}

.circle {
    width: 10em;
    height: 10em;
    font-size: 20px;
    border-top-color: orange;
    border-bottom-color: orange;
    position: relative;
}

.circle::before,
.circle::after {
    content: '';
    position: absolute;
}

.circle::before {
    width: 70%;
    height: 70%;
    border-top-color: orange;
    border-bottom-color: orange;
    animation-duration: 8s;
}

.circle::after {
    width: 40%;
    height: 40%;
    border-top-color: orange;
    border-bottom-color: orange;
    animation-duration: 16s;
}

@keyframes animate {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(1440deg);
    }
}

.odkaz {
    font-size: 30px;
    color: white;
    margin: 0 5px;
    display: block;
    position: absolute;
    top: 0.1%;
    left: 0.1%;
}