let duration = Duration::from_secs(config.time);
    let increment = Duration::new(1, 0);

    loop {
    match duration.checked_sub(increment) {
        Some(_) => {
            println!("Time passed: {:?} ", duration);
            duration - increment;
        }
        None => {
            println!("I finished waiting. The time is now {:?} ", Instant::now());
            break
            }
        }
    }