train.html

<!DOCTYPE html>

<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body bgcolor="#424242">
    <img id="train" src="http://192.168.1.30/train.png" height="128" width="256">
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
    <script>
	$(() => setInterval(()=>{
		$("#train").attr("src", "http://192.168.1.30/train.png?"+new Date().getTime());
	}, 15000));
    </script>
</body>
</html>