#[derive(Copy, Clone, PartialEq, Eq)]
pub enum DayPeriod {
    Night,
    Morning,
    Noon,
    Evening,
}

impl DayPeriod {
    pub fn is_dark(&self) -> bool { *self == DayPeriod::Night }

    pub fn is_light(&self) -> bool { !self.is_dark() }
}