代码如下：
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<meta name="author" content="http://www.softwhy.com/" />
<title>进行中...</title>
<style>
dot {
display:inline-block;
width:3ch;
text-indent:-1ch;
vertical-align:bottom;
overflow:hidden;
animation:dot 3s infinite step-start both;
}
