pygame test.py

import pygame
import sys

pygame.init()
screen = pygame.display.set_mode((800, 600))
clock = pygame.time.Clock()

x = 400
running = True

while running:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False
    
    x += 5
    screen.fill((255, 255, 255))
    pygame.draw.circle(screen, (0, 0, 255), (x, 300), 20)
    pygame.display.flip()
    clock.tick(60)

pygame.quit()
sys.exit()