import pygame, sys

def bouncing_rect():
    global x_speed, y_speed
    moving_rect.x += x_speed
    moving_rect.y += y_speed

    if moving_rect.right >= width or moving_rect.left <= 0:
        x_speed *= -1
    if moving_rect.bottom >= height or moving_rect.top <= 0:
        y_speed *= -1
    
    pygame.draw.rect(screen, (255, 255, 255), moving_rect)
    pygame.draw.rect(screen, (255, 0, 0), other_rect)


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

moving_rect = pygame.Rect(350, 350, 100, 100)
x_speed, y_speed = 5, 4

other_rect = pygame.Rect(300, 600, 200, 100)
other_speed = 2

while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()
    
    screen.fill((30, 30, 30))
    bouncing_rect()
    pygame.display.flip()
    clock.tick(120)