body,
html {
    height: 100%;
    overflow: hidden;
}

body {
    background-color: black;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: Arial, Helvetica, sans-serif;
}

.square {
    height: 300px;
    width: 300px;
    background-color: blue;
    position: relative;
    overflow: hidden;
}

.square::after {
    content: '';
    height: 100px;
    width: 100px;
    position: absolute;
    background-color: orange;
    left: 50%;
    top: 50%;
    transform: translate(45%, -50%);
    box-shadow: 0 0 100px 100px orange;
    transform-origin: -75% 50%;
    animation: rotate 4000ms linear infinite;
}

.content {
    height: 90%;
    width: 90%;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    background-color: white;
    z-index: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

@keyframes rotate {
    from {
        transform: translate(45%, -50%) rotate(0);
    }

    to {
        transform: translate(45%, -50%) rotate(360deg);
    }
}