import pygame
import sys

# Initialize Pygame
pygame.init()

# Create display surface
DISPLAYSURF = pygame.display.set_mode((400, 300))
pygame.display.set_caption('Hello World')

# Main game loop
while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()

    # Fill the screen with a color (optional)
    DISPLAYSURF.fill((0, 0, 0))  # Black background

    # Create a small surface (rectangle)
    surface = pygame.Surface((50, 50))  # Create a surface
    surface.fill((0, 255, 0))  # Fill it with green color
    DISPLAYSURF.blit(surface, (175, 125))  # Draw it at (175, 125)

    # Update the display
    pygame.display.update()