how to set background color in pygame code example

Example 1: how to change the window colour in pygame

import pygame
pygame.init() #initialize pygame
SCREEN_WIDTH = 600 # width (in px)
SCREEN_HEIGHT = 800 # height (in px)

WIN = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT)) # creates a screen of 600px X 800px
RED_VALUE = 255 # should be from 0 - 255
GREEN_VALUE = 255 # should be from 0 - 255
BLUE_VALUE = 255 # should be from 0 - 255
while True:
	pygame.display.update() # updates the screen
    WIN.fill(RED_VALUE,GREEN_VALUE,BLUE_VALUE) # this is going to be white in color

Example 2: how to set background color of an image to transparent in pygame

image = pygame.image.load("Your file location")
image.set_colorkey((0, 0, 0))  # If your bg color is black for the image

Example 3: how to make a backround color in pygame

#getting pygame and another library we need for setup
import pygame, sys

#setup(for starting the pygame i'm pretty sure)
pygame.init()

#making the screen
width = 1280
height = 960
screen=pygame.display.set_mode((width,height))

#this is the color I want to use. you can change it for a different color using a different tutorial
backGroundColor=pygame.Color("LIGHTBLUE")

#to make the background always work
while True:
  #more setup using the special library which is to not give you an error if you quit the code
    for event in pygame.event.get():
        if event.type==pygame.QUIT:
            pygame.quit()
            sys.exit
            break
#over here you color the screen
    screen.fill(backGroundColor)
#setup once again(making it go on i think)
    pygame.display.flip()

#this code was first not tested and i was curious to see if it worked so i ran the code to find out that it was not working lol and then changed it