import pygame, sys

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

    # collusion with screeen boders
    if moving_rect.right >= screen_width or moving_rect.left <= 0:
      x_speed *= -1
    if moving_rect.bottom >= screen_height or moving_rect.top <= 0:
       x_speed *= -1  

    #collusion with rect

    if moving_rect.colliderect(other_rect):
        print("collusion")

    pygame.draw.rect(screen, (255,255,255),moving_rect)
    pygame.draw.rect(screen, (255,0,0),other_rect)

pygame.init()
clock = pygame.time.Clock()
screen_width,screen_height = 800,800
screen = pygame.display.set_mode((screen_width,screen_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))
    pygame.draw.rect(screen, (255,255,255),moving_rect)
    pygame.draw.rect(screen, (255,0,0),other_rect)
    bouncing_rect()
    pygame.display.flip()
    clock.tick(10)