class Timer:
    def __init__(self, interval_s):
        self._interval_s = interval_s
        self._delta = 0
    
    def set_interval(self, new_interval_s):
        self._interval_s = new_interval_s
    
    def update(self, delta):
        self._delta += delta
    
    def check_timer(self):
        if self._delta >= self._interval_s:
            self._delta = 0
            return True
        return False
    
    def reset(self):
        self._delta = 0