Countdown

Component design:

How to use a component:

STM_LMS_Templates::show_lms_template(
    'components/countdown',
    array(
        'id'         => string, (required)
        'start_time' => int, (required)
        'dark_mode'  => bool, (required)
        'style'      => string, (required) ('gray'|'default')
    )
);