1. 引入CSS

<link rel="stylesheet" href="css/style.css">

2. 引入JS

<script  src="js/script.js"></script>

3. HTML代码

<div class="container">
		<div class="input_box">
			<label label_id="input1">用户名</label>
			<input type="text" name="" placeholder="用户名" input_id="input1">
		</div>
		<div class="input_box">
			<label label_id="input2">密码</label>
			<input type="password" name="" placeholder="密码" input_id="input2">
		</div>
		<button class="btn">
			<span class="btn_txt">登录</span>
			<div class="circle one"></div>
			<div class="circle two"></div>
			<div class="circle three"></div>
			<div class="circle four"></div>
		</button>
</div>