Scheduler and rain demo

rain_demo/rain_demo.py

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+# scheduler and accelerometer demoimport randomfrom microbit import *BOARD = {(x, y): 0 for y in range(5) for x in range(5)}POINTS = []class Scheduler:    def __init__(self):        self.tasks = []    def set_task(self, task, delay=0, repeat=False):        cur_time = running_time()        self.tasks.append((cur_time + delay, task, delay, repeat))        self.tasks.sort(key=lambda x: x[0], reverse=True)    def run(self):        while self.tasks:            cur_time = running_time()            time_to_run, task, delay, repeat = self.tasks[-1]            #print (time_to_run, cur_time)            if time_to_run <= cur_time:                #print (self.tasks)                time_to_run, task, delay, repeat = self.tasks.pop()                task()                if repeat:                    self.set_task(task, delay, repeat)def show_board():    make_board()    for (x, y), value in BOARD.items():        display.set_pixel(x, y, value)        def make_board():    global POINTS    new_points = []    for i, (x, y, value) in enumerate(POINTS):        xi = int(round(x))        yi = int(round(y))        value = int(round(value))        if 0 <= xi <= 4 and 0 <= yi <= 4 and 0 <= value <= 9:            BOARD[(xi, yi)] = max(value, BOARD[(xi, yi)])            new_points.append((x, y, value))    POINTS[:] = new_points            def set_random_point():    if len(POINTS) < 3:        position = random.randint(0, 5 * 5 - 1)        y, x = divmod(position, 5)        POINTS.append((x, y, 9))#random.randint(5, 9)))        def fall():    x_delta = accelerometer.get_x() / 2000    y_delta = accelerometer.get_y() / 2000    for i, (x, y, value) in enumerate(POINTS):        #value -= 0.5        x += x_delta        y += y_delta        POINTS[i] = x, y, value        def fade_out():    for (x, y), value in BOARD.items():        if value > 0:            BOARD[(x, y)] = value - 1            scheduler = Scheduler()scheduler.set_task(set_random_point, 100, True)scheduler.set_task(fall, 50, True)scheduler.set_task(fade_out, 80, True)scheduler.set_task(show_board, 20, True)scheduler.run()