<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Garden</title>
    <style>
        html,
        body {
            margin: 0;
            padding: 0;
        }

        .sentinel {
            width: 100vw;
            height: 100vh;
            background: rgba(255, 0, 0, .4);
        }

        .sentinel,
        .center {
            position: absolute;
            text-align: center;
        }
