Emoji match with countdown

# Emoji Match game challenge - chosen from list with minutes and seconds countdown
import os, random
from random import shuffle, randint
from guizero import App, Box, Picture, PushButton, Text
from time import sleep

def timer():
        seconds.value = int(seconds.value) - 1
        if int (seconds.value) == 0:
            seconds.value = 60
            minutes.value = int(minutes.value) - 1
            if int (minutes.value) < 0:
                seconds.cancel(timer)
                seconds.value = 0
                minutes.value = ("Game Over")


def match_emoji(matched):
    if matched:
        result.value = "correct"
    else:
        result.value = "incorrect"

# set the path to the emoji folder
emojis_dir = "emojis"
# create a list of the locations of the emoji images
emojis = [os.path.join(emojis_dir, f) for f in os.listdir(emojis_dir) if os.path.isfile(os.path.join(emojis_dir, f))]
# shuffle the emojis
shuffle(emojis)

app = App("emoji match")
#create the timer text
info_box= Box(app)

score = Text(info_box, text="Time: ", align="left")
seconds = Text(info_box, text = "60", align="right")
seconds.repeat(1000, timer)
minutes = Text(info_box, text = "1", align="right")

# create a box to house the grid
game_box= Box(app)
pictures_box = Box(app, layout="grid")
buttons_box = Box(game_box, layout="grid")
result = Text(app)

matched = emojis.pop()
pics = []
for i in range(8):
    pics.append(emojis.pop())
pics.append(matched)
shuffle(pics)

butts = []
for i in range(8):
    butts.append(emojis.pop())
butts.append(matched)

# create an empty list to which pictures will be added
pictures=[]
for x in range(0,3):
    for y in range(0,3):
        # put the pictures into the list
        picture = Picture(pictures_box, grid=[x,y])
        pictures.append(picture)
        picture.image = pics.pop()

# create an empty list to which buttons will be added
buttons = []
for x in range(0,3):
    for y in range(0,3):
        # put the pictures into the list
        button = PushButton(buttons_box, grid=[x,y])
        buttons.append(button)
        button.image = butts.pop()
        button.update_command(match_emoji, [False])


app.display()