import pygame
import time

pygame.init()

display_width = 640
display_height = 480
white = (255, 255, 255)
black = (0, 0, 0)
gameDisplay = pygame.display.set_mode((display_width, display_height))
pygame.display.set_caption("Pong")

img = pygame.image.load('1.jpg')
clock = pygame.time.Clock()

launched = True
lead_x = 5
lead_y = display_height/2

size_x = 25
size_y = 89

lead_x_change = 0
lead_y_change = 0
while launched:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            launched = False
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_UP:
                lead_x_change = 0
                lead_y_change = -10
            if event.key == pygame.K_DOWN:
                lead_x_change = 0
                lead_y_change = 10

        if event.type == pygame.KEYUP:
            if event.key == pygame.K_UP:
                lead_x_change = 0
                lead_y_change = 0
            if event.key == pygame.K_DOWN:
                lead_x_change = 0
                lead_y_change = 0

        if lead_y - size_y > display_height or lead_y < 0:
            lead_x_change = 0
            lead_y_change = 0

        if lead_y + size_y > display_height:
            lead_x_change = 0
            lead_y_change = 0

    lead_x += lead_x_change
    lead_y += lead_y_change

    gameDisplay.fill(white)
    pygame.draw.rect(gameDisplay, black, [lead_x, lead_y, size_x, size_y])
    pygame.display.flip()
    clock.tick(20)

pygame.quit()
quit()