<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" href="css/bootstrap.min.css">
<link rel="stylesheet" href="css/all.min.css">
<link rel="stylesheet" href="css/main.css">
</head>
<body>
<div class="container h-100 d-flex justify-content-center align-items-center">
<div id="choose" class="item w-100 h-100 d-flex justify-content-center align-items-center">
<label id="label">Choose an image to start</label>
<div id="choose-cont" class="row w-100 h-100 justify-content-around align-items-center">
<div id="img1" class="col-md-4 ch-img">
<img src="./images/img1/whole1.jpg" alt="">
</div>
<div id="img2" class="col-md-4 ch-img">
<img src="./images/img2/whole1.jpg" alt="">
</div>
<div id="img3" class="col-md-4 ch-img">
<img src="./images/img3/whole1.jpg" alt="">
</div>
</div>
<button onclick="start()" id="st-btn" class="btn btn-success w-100">Start</button>
<p id="invalid"></p>
</div>
<div id="puzzle" class="row puzzle w-75">
<div class="h-puzzle d-flex justify-content-center align-items-center">
<p>?</p>
</div>
</div>
</div>
<script src="js/jquery-3.5.1.slim.min.js"></script>
<script src="js/popper.min.js"></script>
<script src="js/bootstrap.min.js"></script>
<script src="js/main.js"></script>
</body>
</html>