Start screen isn't showing up

After I got the paddles to move properly, the start screen stopped showing up at the beginning. I want it to show the actual game screen when you press enter, which worked, until I added the paddles. I know for a fact that the problem has to do with the display update, but I'm not sure how to fix it.

Here's the game loop:

while not x:
  for event in pygame.event.get():
    if event.type == pygame.QUIT: 
      x = True #quits the game when you press X
    if event.type == pygame.KEYUP: #makes start screen go away
      if event.key == pygame.K_RETURN:
        gameScreen() #has the black background and lines

  #moves the paddles
    if event.type == pygame.KEYDOWN:
      if event.key == pygame.K_w: #makes blue paddle go up
        p1Paddle.state = 'up'
        p1Paddle.move()
        
    if event.type == pygame.KEYDOWN:
      if event.key == pygame.K_s: #makes blue paddle go down
        p1Paddle.state = 'down'
        p1Paddle.move()

    if event.type == pygame.KEYDOWN:
      if event.key == pygame.K_UP: #makes red paddle go up
        p2Paddle.state = 'up'
        p2Paddle.move()
        
    if event.type == pygame.KEYDOWN:
      if event.key == pygame.K_DOWN: #makes red paddle go down
        p2Paddle.state = 'down'
        p2Paddle.move()

        
    gameScreen() #updates the display (problem- not sure what to put instead)
        
    p1Paddle.show()
    p2Paddle.show()
    ball.show()

I fixed it! (sort of*)

I added a variable, start, before the loop and set it as false. Then, at the end of the loop I replaced this:

    gameScreen() #updates the display (problem- not sure what to put instead)
        
    p1Paddle.show()
    p2Paddle.show()
    ball.show()

with this:

    if start == True:
      gameScreen()
      p1Paddle.show() #make the paddles and ball show up vv
      p2Paddle.show()
      ball.show()

*Now the start screen shows up, but the paddles show up over it at the start- but that's it's own problem.