import pygame
import random

WIDTH=360
HEIGHT=480
FPS=30

BLACK=(0,0,0)
WHITE=(255,255,255)
RED=(255,0,0)
GREEN=(0,255,0)
BLUE=(0,0,255)


class Player(pygame.sprite.Sprite):
    def __init__(self):
        pygame.sprite.Sprite.__init__(self)
        self.image=pygame.Surface((50,50))
        self.image.fill(GREEN)
        self.rect=self.image.get_rect()
        self.rect.center=(WIDTH / 2, HEIGHT / 2)

    def update(self):
        self.rect.x+=5

pygame.init()
screen=pygame.display.set_mode((WIDTH,HEIGHT))
pygame.display.set_caption("My Game")
clock=pygame.time.Clock()
all_sprites=pygame.sprite.Group()
player=Player()
all_sprites.add(player)

running=True
while running:
    clock.tick(FPS)

    for event in pygame.event.get():
        if event.type==pygame.QUIT:
            running=False

    all_sprites.update()


    screen.fill(BLACK)
    all_sprites.draw(screen)
    pygame.display.flip()

pygame.quit()