<!doctype html>
<html lang="en">
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
<head>
  <meta charset="UTF-8">
  <title>Toggle</title>
  <style>
  .demo0 {
    border-radius: 4px;
    background-color: rgb(240, 240, 232);
    position: relative;
    margin: 5px 3px 10px;
    width: 450px;
    height: 50px;
  }
  .demo0-block {
    position: absolute;
    width: 50px;
    height: 50px;
    border-radius: 4px;
    background-color: rgb(130, 181, 198);
  }
  </style>
