import pygame

# Homework: change the background color by pressing keys.
# - Pressing R should change the background to red.
# - Pressing G should change the background to green.
# - Pressing B should change the background to blue.
# Hint: store the current color in a variable and update it on KEYDOWN events.
#       pygame.K_r, pygame.K_g, pygame.K_b are the key constants.

pygame.init()

screen = pygame.display.set_mode((640, 480))
pygame.display.set_caption("Key Color")

# TODO: define your color variables and a starting background color variable
# bg_color = (30, 30, 30)

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

        elif event.type == pygame.KEYDOWN:
            pass  # TODO: replace pass with your key checks

    # TODO: fill with bg_color instead of a fixed color
    screen.fill((30, 30, 30))
    pygame.display.flip()

pygame.quit()