Draw some shapes and make a simple brush with background music

drawing.py

import pygame

pygame.init()

pygame.mixer.music.load("music.mp3")
pygame.mixer.music.play()

screen_width = 800
screen_height = 600

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

red = (255, 0, 0)
green = (0, 255, 0)
blue = (0, 0, 255)

game_screen = pygame.display.set_mode((screen_width, screen_height))
game_screen.fill(black)

pygame.draw.line(game_screen, blue, (100, 200), (300, 500), 10)
pygame.draw.rect(game_screen, red, (400, 300, 25, 25))
pygame.draw.circle(game_screen, white, (150, 150), 80)

while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.mixer.music.stop()
            pygame.quit()
            quit()

    mouse_position = pygame.mouse.get_pos()
    mouse_click = pygame.mouse.get_pressed()

    if mouse_click[0] == 1:
        pygame.draw.circle(game_screen, white, (mouse_position[0], mouse_position[1]), 20)
    
    pygame.display.update()