A simple screen using pygame

game_screen.py

import pygame as pg

# Colors
red = pg.Color(255, 0, 0)
green = pg.Color(0, 255, 0)
black = pg.Color(0, 0, 0)
white = pg.Color(255, 255, 255)
brown = pg.Color(165, 42, 42)
# Variables
screen_width = 400
screen_height = 400

# Initialize pygame
pg.init()
# The screen
wn = pg.display.set_mode((screen_width, screen_height))
pg.display.set_caption('A simple game of Snake')
# The mainloop
run = True
while run:
    # Catches all the events that have happened since the game started
    for event in pg.event.get():
        # When you press the close window button
        if event.type == pg.QUIT:
            run = False
    # Fills the screen with black color
    wn.fill(black)
# Exits pygame
pg.quit()