Simple implementation python pygame The Matrix

#### display character classes

#coding=utf-8
import pygame
import random

class gameSprite(pygame.sprite.Sprite):
 def __init__(self, image_name, speed=1):
  super().__init__()
  
  
  font = pygame.font.SysFont('Consolas',40)
  rtext = font.render(bytes(image_name, encoding='utf-8'), False, (random.randint(1, 254), random.randint(0, 255), random.randint(0, 255)))

  self.image = rtext
  self.speed = speed
  self.rect  = self.image.get_rect()

 def update(self, *args):
  self.rect.y += self.speed
 
 def setSpeed(self, speed):
  self.speed = speed

## cycles main function

#coding=utf-8
import pygame
import random
from plane_sprites import *

pygame.init()
clock = pygame.time.Clock()
screen = pygame.display.set_mode((0,0),pygame.FULLSCREEN)

listSprite = []
for nIndex in range(1000):
 
 spriteTemp = gameSprite(chr(random.randint(48, 122)),random.randint(5, 100))
 spriteTemp.rect.x = random.randint(0, 1920)
 listSprite.append(spriteTemp)
 
char_group = pygame.sprite.Group(listSprite)

while True:
 for event in pygame.event.get():
   if event.type == pygame.QUIT:
    pygame.quit()
   if event.type == pygame.KEYDOWN:
    if event.key == pygame.K_ESCAPE:
     pygame.quit()
     
 

  
 for nIndex in range(1000):
  spriteTemp = listSprite[nIndex]
  if spriteTemp.rect.y > 1080 :
   spriteTemp.rect.x = random.randint(0, 1920)
   spriteTemp.rect.y = 0
   spriteTemp.setSpeed(random.randint(5, 100))
   

 screen.fill((0, 0, 0))
 
 char_group.update()
 
 char_group.draw(screen)
 
 pygame.display.update()
 
 clock.tick(60)