4 <meta name="viewport" content="width=400,height=400,initial-scale=1.0">
8 background-color: blue;
13 <body style="width: 500px; height: 500px">
14 <div id="bottom-fixed" style="left: 0px; bottom: 0px; width: 20px; height: 20px"></div>
15 <div id="top-bottom-fixed" style="left: 0px; top: 0px; bottom: 0px; width: 20px"></div>
16 <div id="right-fixed" style="top: 0px; right: 0px; width: 20px; height: 20px"></div>
17 <div id="left-right-fixed" style="top: 0px; left: 0px; right: 0px; height: 20px"></div>