Pygame

import pygame
pygame.init()

win = pygame.display.set_mode((500, 500))
pygame.display.set_caption("Bouncy Ball")

x = 210
y = 400
b_x = 250
b_y = 100
width = 100
hight = 17
speed = 16
white = 255, 255, 255
bold_drop = 17

run = True
while run:
    pygame.time.delay(40)

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            run = False

    keys = pygame.key.get_pressed()

    if keys[pygame.K_RIGHT]:
        x += speed
    if keys[pygame.K_LEFT]:
        x -= speed

    win.fill((0, 0, 0))
    rectancel = pygame.draw.rect(win, (white), (x, y, width, hight))
    pygame.display.update()

    ball = pygame.draw.circle(win, (white), (b_x, b_y), 7)
    pygame.display.update()


    b_y += bold_drop

    if ball.colliderect(rectancel):
        b_y -= bold_drop

pygame.quit()