#gg {
            width: 100px;
            height: 100px;
            background: red;
            position: relative;
        }

        #gg:before {
            content: "";
            position: absolute;
            top: 0;
            left: 38px;
            border-bottom: 20px solid red;
            border-right: 20px solid #FFF;
            width: 42px;
            height: 0;
        }

        #gg:after {
            content:"";
            position: absolute;
            bottom: 0;
            left: 0;
            border-top: 20px solid red;
            border-left: 20px solid #FFF;
            width: 42px;
            height: 0;
        }
		img{width:100%;height:100%;}