Hey guys, could you help me with this. Im kinda stuck in the 15 Pygame video "Game Over Functionality". I followed the steps and codes but for some reason it didn't work. when i run it, i got an error. Could you help me out please

Error:
Traceback (most recent call last):
  File "/Users/briansabbath/Desktop/Python/Brian/Game Project/Game.py", line 95, in
    game_loop()
  File "/Users/briansabbath/Desktop/Python/Brian/Game Project/Game.py", line 45, in game_loop
    pygame.display.update()
KeyboardInterrupt



Code:

import pygame

pygame.init()

white = (255, 255, 255)
black = (0, 0, 0)
red = (255, 0, 0)

displayWidth = 600
displayHeight = 400

gameDisplay = pygame.display.set_mode((displayWidth, displayHeight))

pygame.display.set_caption('Python King')

clock = pygame.time.Clock()

block_size = 10

FPS = 15

font = pygame.font.SysFont(None, 25)

def message_screen(msg, color):
    screen_text = font.render(msg, True, color)
    gameDisplay.blit(screen_text, [displayWidth/2, displayHeight/2])

def game_loop():

    game_exit = False
    game_over = False

    lead_x = displayWidth/2
    lead_y = displayHeight/2

    lead_x_change = 0
    lead_y_change = 0

    while not game_exit:

        while game_over == True:

            gameDisplay.fill(white)
            message_screen("Game Over, C to Play, Q to Quit", red)
            pygame.display.update()

            for event in pygame.event.get():

                if event.type == pygame.K_DOWN:

                    if event.key == pygame.K_q:
                        game_exit = True
                        game_over = False

                    if event.key == pygame.K_c:
                        game_loop()

        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                game_exit = True

            if event.type == pygame.KEYDOWN:

                if event.key == pygame.K_LEFT:
                    lead_x_change = -block_size
                    lead_y_change = 0

                elif event.key == pygame.K_RIGHT:
                    lead_x_change = block_size
                    lead_y_change = 0

                elif event.key == pygame.K_UP:
                    lead_y_change = -block_size
                    lead_x_change = 0

                elif event.key == pygame.K_DOWN:
                    lead_y_change = block_size
                    lead_x_change = 0

        if lead_x >= displayWidth or lead_x < 0 or lead_y >= displayHeight or lead_y < 0:
            game_over = True

        lead_x += lead_x_change
        lead_y += lead_y_change

        gameDisplay.fill(white)
        pygame.draw.rect(gameDisplay, black, [lead_x, lead_y, block_size, block_size])
        pygame.display.update()

        clock.tick(FPS)

    pygame.quit()
    quit()

game_loop()