*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body{
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: #111;
}
body .scan{
    /* border: 1px solid red; */
    width: 350px;
    height: 350px;
    position: relative;
    background: url(border.png);
    background-size: 350px;
}
.code{
    position: relative;
    top: 20px;
    left: 20px;
    width: 300px;
    height: 300px;
    background: url(QR_Code01.png);
    background-size: 300px;
}
.code::before{
    content: '';
    position:absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url(QR_Code02.png);
    background-size: 300px;
    animation: animate 5s ease-in-out infinite;
}
@keyframes animate{
    0%,100%{
        height: 0;
    }
    50%{
        height: 100%;
    }
}
.code::after{
    content: '';
    position:absolute;
    top: 10px;
    left: 14px;
    width: 90%;
    height: 6px;
    border-radius: 5px;
    background: green;
    animation: animate1 5s ease-in-out infinite;
}
@keyframes animate1{
    0%,100%{
        top: 0;
    }
    50%{
        top: 100%;
    }
}
h3{
    color: aliceblue;
    margin-top: 100px;
    margin-left: 100px;
    font-family: Arial, Helvetica, sans-serif;
    letter-spacing: 0.05cm;
    font-size: 30px;
}
span{
    animation: animate2 1s linear infinite;
}
@keyframes animate2{
    0%{
        opacity: 0;
    }
    100%{
        opacity:100%;
    }
}