       position: relative;
                width: 1em;
            }
            #div2, #div3, #div4
            {
                position: absolute;
                top: 0;
            }
            #div2, #div4
            {
                background: black;
            }
            #div2
            {
                height: 1.2em;
                left: 0;
            }
            #div3
            {
                background: blue;
                color: blue;
                left: 1em;
           