Chapter3_ChangingColor.py

import pygame

pygame.init()

screen=pygame.display.set_mode((600,400))
pygame.display.set_caption("Changing Screen Color")

running=True
#Screen : RGB => Red, Green, Blue
color=(0,0,0)

while running:
    screen.fill((0,0,0))

    for event in pygame.event.get():
        if event.type==pygame.QUIT:
            running=False
    
    key=pygame.key.get_pressed()

    #color changing logic
    if key[pygame.K_r]:  #red
        color=(255,0,0)
    if key[pygame.K_g]: #green
        color=(0,255,0)
    if key[pygame.K_b]: #blue
        color=(0,0,255)
    if key[pygame.K_y]: #yellow
        color=(255,255,0)
    
    screen.fill(color)

    pygame.display.update()

pygame.quit()