So I'm writing this code for a school assignment, which I'm supposed to use pygame and display some text. I put those text in different pages, and if single click the screen, it will show the next screen. 

Here is what I have so far:

```
import pygame

pygame.init()
pygame.font.init()
# defining the screen
SIZE = (1000, 700)
screen = pygame.display.set_mode(SIZE)
# define time
clock = pygame.time.Clock()
#define button
button = 0
# define font
fontIntro = pygame.font.SysFont("Times New Roman",30)
# define draw scene
def drawIntro(screen):
    #start
    if button > 0:
        screen.fill((0, 0, 0))
        text = fontIntro.render("Sigle click to start", 1, (255,255,255))
        screen.blit(text, (300, 300, 500, 500))
        pygame.display.flip() 

    #page1
    if button == 1:
        screen.fill((0, 0, 0))
        text = fontIntro.render("page 1", True, (255, 255, 255))
        pygame.display.flip()
    #page2
    if button == 1:
        screen.fill((0, 0, 0))
        text = fontIntro.render("page 2", True, (255, 255, 255))
        screen.blit(text, (300,220,500,200))
        pygame.display.flip()
    #page3
    if button == 1:
        screen.fill((0, 0, 0))
        text = fontIntro.render("page3", True, (255, 255, 255))
        screen.blit(text, (200,190,500,200))
        pygame.display.flip()

running = True
while running:
    for evnt in pygame.event.get():
        if evnt.type == pygame.QUIT:
            running = False
        if evnt.type == pygame.MOUSEMOTION:
            mx,my = evnt.pos
            print(evnt.pos)
            drawIntro(screen)

pygame.quit()

```

Though it is not working, can someone please help?! Thanks!