HTMLify

* {
    box-sizing: border-box;
}

body {
    background-color: #161622;
    display: grid;
    place-items: center;
    height: 100vh;
}

.configure-border-1 {
    width: 115px;
    height: 115px;
    padding: 3px;
    position: absolute;
    background: #00bcd4;
    animation: configure-clockwise 3s ease-in-out 0s infinite alternate;
}

.configure-border-2 {
    width: 115px;
    height: 115px;
    padding: 3px;
    background: #8bc34a;
    transform: rotate(45deg);
    animation: configure-xclockwise 3s ease-in-out 0s infinite alternate;
}

.configure-core {
    width: 100%;
    height: 100%;
    background-color: #161622;
}

@keyframes configure-clockwise {
    0% {
        transform: rotate(0);
    }

    25% {
        transform: rotate(90deg);
    }

    50% {
        transform: rotate(180deg);
    }

    75% {
        transform: rotate(270deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

@keyframes configure-xclockwise {
    0% {
        transform: rotate(45deg);
    }

    25% {
        transform: rotate(-45deg);
    }

    50% {
        transform: rotate(-135deg);
    }

    75% {
        transform: rotate(-225deg);
    }

    100% {
        transform: rotate(-315deg);
    }
}