1<!DOCTYPE html> 2<html> 3<head> 4 <meta name="viewport" content="width=400,height=400,initial-scale=1.0"> 5 <style> 6 div { 7 position: fixed; 8 background-color: blue; 9 } 10 </style> 11</head> 12 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> 18</body> 19</html> 20