Why is my code exiting as soon as I start it?

I have a pygame project where I need to display a button according to a randomly generated sequence. It is currently just exiting as soon as I start it

import pygame
import os
import random

# Initialize pygame starts 
pygame.init()

# Set the dimensions of the screen
screen_width = 1275
screen_height = 750


# Set the colors
white = (255, 255, 255)
black = (0, 0, 0)

# Set the font
font = pygame.font.SysFont('Arial', 20)

# Set the button properties
button_radius = 70
button_x_spacing = 400
button_y_spacing = 200

# Set the flower image
flower_image = pygame.image.load(os.path.join(os.path.expanduser("~"), "Documents", "flower.jpg"))
flower_rect = flower_image.get_rect()
flower_rect.center = (screen_width//2, screen_height//2)

# Set the button positions
button_positions = [
    (button_x_spacing, button_y_spacing),
    (button_x_spacing, button_y_spacing + 200),
    (button_x_spacing, button_y_spacing + 400)
]

# Initialize the screen
screen = pygame.display.set_mode((screen_width, screen_height))

# Set the caption
pygame.display.set_caption("Marmoset Buttons")

# Set the clock
clock = pygame.time.Clock()

# Set the loop variable
running = True

# Set the timer
timer = 0

# Draw the buttons on the screen
#def draw_buttons():
    #for i, pos in enumerate(button_positions):
    #for i in sequence:
        #pygame.draw.circle(screen, white, button_positions[i], button_radius)
        #text_surface = font.render(f"Button {i}", True, black)
        #text_rect = text_surface.get_rect(center=button_positions[i])
        #screen.blit(text_surface, text_rect)

# Generating sequence of numbers
sequence = []
for i in range(0,10):
    n = random.randint(0,2)
    sequence.append(n)

# Main game loop
#while running:
    # Set the frame rate
    #clock.tick(60)

    for i in sequence:
    # Check for events
        screen.fill(black)
        pygame.draw.circle(screen, white, button_positions[i], button_radius)
        text_surface = font.render(f"Button {i}", True, black)
        text_rect = text_surface.get_rect(center=button_positions[i])
        screen.blit(text_surface, text_rect)
        pygame.display.update()

        for event in pygame.event.get():
            #if event.type == pygame.QUIT:
                #running = 1
            if event.type == pygame.MOUSEBUTTONDOWN:
                distance_button = pygame.math.Vector2(button_positions[i]) - pygame.math.Vector2(pygame.mouse.get_pos())
                flower_image = pygame.image.load(os.path.join(os.path.expanduser("~"), "Documents", f"flower{i}.jpg"))
                #distance_button2 = pygame.math.Vector2(button_positions[1]) - pygame.math.Vector2(pygame.mouse.get_pos())
                #distance_button3 = pygame.math.Vector2(button_positions[2]) - pygame.math.Vector2(pygame.mouse.get_pos())
                if distance_button.length() < button_radius:
                    screen.blit(flower_image, flower_rect)
                    #timer = pygame.time.get_ticks()
                    #flower_image = pygame.image.load(os.path.join(os.path.expanduser("~"), "Documents", "flower.jpg"))
                #elif distance_button2.length() < button_radius:
                    #timer = pygame.time.get_ticks()
                    #flower_image = pygame.image.load(os.path.join(os.path.expanduser("~"), "Documents", "flower1.jpg"))
                #elif distance_button3.length() < button_radius:
                    #timer = pygame.time.get_ticks()
                    #flower_image = pygame.image.load(os.path.join(os.path.expanduser("~"), "Documents", "flower2.jpg"))
                #else:
                    #timer = pygame.time.get_ticks()
                    #flower_image = pygame.image.load(os.path.join(os.path.expanduser("~"), "Documents", "flower3.jpg"))
    


                
   
    # Fill the screen with black
    #screen.fill(black)
   
    # Draw the buttons on the screen
    #draw_buttons()
   
    # Check the timer
    #if timer != 0:
        #current_time = pygame.time.get_ticks()
        #if current_time - timer < 3000:
            #screen.blit(flower_image, flower_rect)
        #else:
            #timer = 0
   
    # Update the screen
    #pygame.display.update()

# Quit pygame
#pygame.quit()

I tried commenting some previous unnecessary code I had but nothing is changing. I had it working before where I displayed all 3 buttons at once but when I tried changing it to randomly show one it didn't work.