hello.html

$def with (light_statuses)
$ str_status = None

$if light_statuses:
        <form action="/hello" method="POST">
            $if light_statuses['green'] == 0:
                <input type="image" name="led" src="static/img/green_button_off.png" value="green">
            $else:
                <input type="image" name="led" src="static/img/green_button_on.png" value="green">
            <br/>
            $if light_statuses['blue'] == 0:
                <input type="image" name="led" src="static/img/blue_button_off.png" value="blue">
            $else:
                <input type="image" name="led" src="static/img/blue_button_on.png" value="blue">
            <br/>
            $if light_statuses['red'] == 0:
                <input type="image" name="led" src="static/img/red_button_off.png" value="red">
            $else:
                <input type="image" name="led" src="static/img/red_button_on.png" value="red">
        </form>
$else:
         <form action="/hello" method="POST">
            <input type="image" name="led" src="static/img/green_button.png" value="green">
            <br/>
            <input type="image" name="led" src="static/img/blue_button.png" value="blue">
            <br/>
            <input type="image" name="led" src="static/img/red_button.png" value="red">
        </form>