bg="bg.jpg"
ball="ball.png"

import pygame, time, sys

from pygame.locals import *

pygame.init()
screen = pygame.display.set_mode((600,400),0,32)
pygame.display.set_caption('Breakout')

background = pygame.image.load(bg).convert()
ball = pygame.image.load(ball).convert_alpha()
ballRect = ball.get_rect()

#set up a list for speed variable
speed = [1,1]
#create a variable for black
black = 0, 0, 0

p1Paddle = pygame.Rect (10, 370, 50, 10)
PADDLE_COLOR = pygame.color.Color("red")
paddleSpeedX = 0
#Game Loop

while True:
    for event in pygame.event.get():
        if event.type==QUIT:
            pygame.quit()
            sys.exit()
#moving the paddle left and right
    if event.type == KEYDOWN:
        if event.key == K_LEFT and p1Paddle.left >0:
            paddleSpeedX = -2
        elif event.key == K_RIGHT and p1Paddle.right <600:
            paddleSpeedX = 2
    else:
            paddleSpeedX = 0


    p1Paddle.move_ip(paddleSpeedX, 0)



    # move object
    ballRect.move_ip(speed)
    #check if ball touches edge
    if ballRect.left<0 or ballRect.right > 600:
    #reverse direction but keep moving
        speed[0] = -speed[0]
    if ballRect.top < 0 or ballRect.bottom > 400:
        speed[1] = -speed[1]
    #collision with paddle
    if p1Paddle.colliderect(ballRect) and speed[1] > 0:
        speed[1] = -speed[1]
    time.sleep(0.005)
    screen.blit(background, (0,0))
    screen.blit(ball, ballRect)
    screen.fill(PADDLE_COLOR, p1Paddle)

    pygame.display.update()