*{
    margin: 0;
    padding: 0;
    box-sizing: content-box;
}
.wrap{
    /* width: 800px;
    height: 800px; */
    /* background: #EDEDED; */
    background: #bfbfbf;
}

#main{
    width: 800px;
    height: 800px;
    padding: 50px;
    margin: 0 auto;                                
}
#main li{
    list-style: none;
    width: 100px;
    height: 100px;
    float: left;
    border: 1px solid #F6F6F6;
    margin: 1px;    
    cursor: pointer;
    background-image: url(https://random.imagecdn.app/800/800);
    /*  background-image: url(face.jpg); */
    /*  background-image: url(https://www.bmwusa.com/content/dam/bmwusa/certified-preowned/desktop/Road-Test.jpg.bmwimg.xlarge.jpg); */                 
    background-size:  300px 300px;
    background-repeat: no-repeat;
    position: relative;
}


.clock {
    position: absolute;
    width: 150px;
    height: 150px;
    border: 20px solid #b06a26;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    box-shadow: inset 0px 0px 10px black;
}

.clock::before {
    position: absolute;
    content: '';
    height: 130px;
    width: 10px;
    background: black;
    top: 50%;
    left: calc(50% - 5px);
    border-radius: 5px;
    animation: spin 6s linear infinite;
    transform-origin: top;
}

.clock::after {
    position: absolute;
    content: '';
    height: 100px;
    width: 10px;
    background: black;
    top: 50%;
    left: calc(50% - 5px);
    border-radius: 5px;
    animation: spin 72s linear infinite;
    transform-origin: top;
    
}

@keyframes spin {
    0% {
        transform: rotate(-180deg)
    }
    100% {
        transform: rotate(180deg)
    }
}