<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Before After Effect</title>
<style>
.container {
position: relative;
width: 80%;
max-width: 600px;
margin: 50px auto;
overflow: hidden;
}...