[pyGame] More Text in one Window, example needed !

[JamieVanCadsand]

Hey Game Developers...

I try to create more tekst fonts in one game window, in one script...
But it don't works...

This is my script:

from datetime import datetime

import pygame
import sys

pygame.init()

size = (640, 480)
screen = pygame.display.set_mode(size)
pygame.display.set_caption("Clock")

WHITE = (255, 255, 255)
GREEN = (0, 255, 0)

done = False
clock = pygame.time.Clock()

while not done:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            done = True
        elif event.type == pygame.KEYDOWN:
            if event.key == pygame.K_ESCAPE:
                done = True



    
    screen.fill(WHITE)

    now = datetime.now()
    
    font1 = pygame.font.SysFont('Calibri', 25, True, False)
    text1 = font.render('Sec: ' + str(now.second), True, GREEN)
    screen.blit(text1, [320, 240])
    
    font2 = pygame.font.SysFont('Calibri', 25, True, False)
    text2 = font.render('Min: ' + str(now.minute), True, GREEN)
    screen.blit(text2, [320, 230])

    font3 = pygame.font.SysFont('Calibri', 25, True, False)
    text3 = font.render('Hou: ' + str(now.hour), True, GREEN)
    screen.blit(text3, [320, 220])
    
    pygame.display.flip()
    clock.tick(60)

pygame.quit()
sys.exit()

Pygame don't run my game perfect, my screen is black... please whats wrong with my code ?...
Can anyone give my an example code to lost this problem ?...

Thanks, Jamie.