Why does my Pygame label not show up even though I copied from my other one that worked?

Question

I am making a Pygame game and I have a label that every time you lose it should make the screen black and say GAME OVER. This is my code and the Label won't show up even though I copied it from my other label code and just changed it to label2. What is wrong?

if self.rect.colliderect(obstacle2.rect) or self.rect.colliderect(obstacle1.rect):
            obstacle2.kill()
            obstacle1.kill()
            player.kill()
            screenColor = BLACK
            default_font2 = pygame.font.get_default_font()
            font_renderer2 = pygame.font.Font(default_font2, 100)
            label2 = font_renderer2.render('GAME OVER', True, WHITE)
            label2_rect = label2.get_rect()
            label2_rect.center = screen_rect.center
            screen.blit(label2, label2_rect)

Answer 1

You need to draw the label in the application loop. The condition self.rect.colliderect(obstacle2.rect) or self.rect.colliderect(obstacle1.rect) is just fulfilled in a single frame. Hence the label is just visible for a single frame and not noticeable.

---

Before the application loop, add a game_over variable:

game_over = False

Set the variable when the collision is detected:

if self.rect.colliderect(obstacle2.rect) or self.rect.colliderect(obstacle1.rect):
    obstacle2.kill()
    obstacle1.kill()
    player.kill()
    screenColor = BLACK

    # [...]

    game_over = True

Draw the text in the application loop depending on game_over :

# application loop
while True:

    # [...]

    if game_over
        # [...]

        screen.blit(label2, label2_rect)

    pygame.display.update()