timer.py

from microbit import *
import music

def display_digit(x, digit):
    "Show a single digit in column"
    x = 4 - x
    digit = 9 - digit
    for j in range(5):
        y = digit - j
        if y >= 0 and y < 5:
            display.set_pixel(x, y, 9)


def display_number_at(x, number):
    "Show a two-digit number at given column"
    for i in range(2):
        tenth = number // 10
        digit = number - tenth * 10
        number = tenth        
        display_digit(x + i, digit)


def display_numbers(number1, number2):
    "Show two two-digit numbers on the LED matrix"
    display.clear()
    display_number_at(3, number1)
    display_number_at(0, number2)


def count_down(minutes, dot):
    minutes = minutes - 1
    seconds = 60

    while minutes > 0 or seconds > 0:
        if button_a.was_pressed():
            display.clear()
            return
 
        sleep(900)
        if dot:
            display.set_pixel(2, 0, 5)
        sleep(100)
        
        seconds = seconds - 1

        display_numbers(minutes, seconds)
        
        if minutes == 0 and seconds < 10:
            music.pitch(440, 10)

        if seconds == 0 and minutes > 0:
            minutes = minutes - 1
            seconds = 60


music.play(music.POWER_UP)

while True:
    if button_a.was_pressed():
        work_minutes = button_b.get_presses()
        if work_minutes == 0:
            work_minutes = 20
        pause_minutes = work_minutes // 4
        
        music.play(["C4:2", "G4:2"])
        count_down(work_minutes, True)
        music.play(["G4:2", "C4:2"])
        
        if pause_minutes > 0:
            count_down(pause_minutes, False)
        music.play(["C4:2", "G4:2"])