from time import time


class Timer:
    def __init__(self) -> None:
        self.running = False
        self.old = 0

    def control_fps(self, fps: int) -> int:
        if not self.running:
            self.old = time()
            return

        delay_between_frames = 1 / fps
        now = time()
        while now - self.old < delay_between_frames:
            now = time()
        self.old = now