simple bounce pygame python code

## I'm always looking for examples, so if I can provide one that I had a hard time
## finding ,  I will.    Remember to put your own images in.  mine only work for me.

##  diagonal bounce from chapter 5, Beggining Game Development with Pygame,
## python: Will McGugan


background_image = ("UnicornPoop/CRSwall.jpg")
sprite_image_Right = ("UnicornPoop/brushRight.png")  #your images here  ###################("filename/imagename.png") or just('filename.ext')
sprite_image_Left = ("UnicornPoop/brushLeft.png")

import pygame
from pygame.locals import*
from sys import exit
from vectorMagnitude import Vector2

pygame.init()

screen = pygame.display.set_mode((600, 800), 0, 32)

background= pygame.image.load(background_image).convert()

sprite = pygame.image.load(sprite_image_Right)
sprite_left = pygame.image.load(sprite_image_Left)

clock = pygame.time.Clock()

x, y = 100., 100.
speed_x, speed_y = 133., 170.


while True:
    for event in pygame.event.get():
        if event.type == QUIT:
            exit()

       

    screen.blit(background, (-5, -5))
    screen.blit(sprite, (x, y))
   
    time_passed = clock.tick(30)
    time_passed_seconds = time_passed / 1000.

    x += speed_x * time_passed_seconds
    y += speed_y * time_passed_seconds

    if x > 600 - sprite.get_width():
        speed_x = -speed_x
        x = 600 - sprite.get_width()
    elif x < 0:
        speed_x = -speed_x
        x = 0

    if y > 800 - sprite.get_height():
        speed_y = -speed_y
        y = 800 - sprite.get_height()
    elif y < 0:
        speed_y = -speed_y
        y = 0

    pygame.display.update()