.scanner-laser{
            position: absolute;
            margin: 40px;
            height: 30px;
            width: 30px;
        }
        .laser-leftTop{
            top: 0;
            left: 0;
            border-top: solid red 5px;
            border-left: solid red 5px;
        }
        .laser-leftBottom{
            bottom: 0;
            left: 0;
            border-bottom: solid red 5px;
            border-left: solid red 5px;
        }
        .laser-rightTop{
            top: 0;
            right: 0;
            border-top: solid red 5px;
            border-right: solid red 5px;
        }
        .laser-rightBottom{
            bottom: 0;
            right: 0;
            border-bottom: solid red 5px;
            border-right: solid red 5px;
        }