trait toggle {
    fn toggle(&mut self) -> bool;
}

impl toggle for u8 {
    fn toggle(&mut self) -> bool {
        if *self == 0xFF {
            *self = *self ^ 0x00;
            return true;
        } else if *self == 0x00 {
            *self = *self ^ 0xFF;
            return true;
        } else {
            return false;
        }
    }
}