title: pygame.error: video system not initialized
body: <p>I don't seem to able to get rid of this error, when I try to exist the game. the game runs fine but only get the error when I try to exist the game.  </p>
  
  <pre><code>import pygame
  from pygame import *
  import random
  import time
  import os
  import sys
  from pygame.locals import *
  
  
  black = (0,0,0)
  white = (255,255,255)
  
  pygame.init()
  
  def game():
  
   os.environ['SDL_VIDEO_CENTERED'] = '1'
   mouse.set_visible(False)
  
  #screen
  screen_width = 800
  screen_height = 500
  screen = pygame.display.set_mode([screen_width,screen_height])
  #load images etc.
  backdrop = pygame.image.load('bg.jpg').convert_alpha()
  menu = pygame.image.load('green.jpg').convert_alpha()
  ballpic = pygame.image.load('ball.gif').convert_alpha()
  mouseball = pygame.image.load('mouseball.gif').convert_alpha()
  display.set_caption('Twerk')
  back = pygame.Surface(screen.get_size())
  
  def text(text,x_pos,color,font2=28):
      tfont = pygame.font.Font(None, font2)
  
      text=tfont.render(text, True, color)
      textpos = text.get_rect(centerx=back.get_width()/2)
      textpos.top = x_pos
      screen.blit(text, textpos)
  
  start = False
  repeat = False
  while start == False:
      for event in pygame.event.get():
          if event.type == pygame.QUIT:
              start = True
              #falling = True
              #finish = True
  
          if event.type == pygame.KEYDOWN:
              if event.key == pygame.K_SPACE:
                  start = True
      #game over screen
      screen.blit(menu,[0,0])
      pygame.display.set_caption("TWERK")
  
      #Text
      #"Welcome to Escape"
      #needs replacing with logo 
      text("Twerk",60,white,300)
  
      #"Instructions"
      text("Instructions",310,white)
      text("----------------------------------------------------------------------------------------",320,white)
      text("Avoid the the enemies",340,white)
      text("Last as long as you can!",360,white)
      text("Press space to start",420,white)
      pygame.display.flip()
  
  
  while start == True:
  positionx=[]
  positiony=[]
  positionxmove=[]
  positionymove=[]
  falling = False
  finish = False
  score=0
  enemies=4
  velocity=1
  
  for i in range(enemies):
    positionx.append(random.randint(300,400)+random.randint(-300,200))
    positiony.append(random.randint(200,340)+random.randint(-200,100))
    positionxmove.append(random.randint(1,velocity))
    positionymove.append(random.randint(1,velocity))
  
  
  font = pygame.font.Font(None, 28)
  text = font.render('Starting Twerk... ', True, (100,100,100))
  textRect = text.get_rect()
  textRect.centerx = screen.get_rect().centerx
  textRect.centery = screen.get_rect().centery
  
  screen.blit(backdrop, (0,0))
  screen.blit(text, textRect)
  pygame.display.update()
  game=time.localtime()
  
  while start == True:
    end=time.localtime()
    score= (end[1]-game[1])*3600 + (end[4]-game[4])*60 + end[5]-game[5]
    if score &gt; 1: break
  
  first=True
  strtTime=time.localtime()
  
  while not finish or falling:
    screen.blit(backdrop, (0,0))
    for i in range(enemies):
      screen.blit(ballpic,(positionx[i],positiony[i]))
      (mousex,mousey)=mouse.get_pos()
      screen.blit(mouseball,(mousex,mousey))
      display.update()
      strt = time.localtime()
  
    if first:
      while True:
        end=time.localtime()
        score= (end[3]-strt[3])*3600 + (end[4]-strt[4])*60 + end[5]-strt[5]
        if score &gt; 3: break
      first = False
  
    if falling:
      for i in range(enemies):
        positionymove[i]=1000
        positionxmove[i]=0
  
  
    for i in range(enemies): positionx[i]=positionx[i]+positionxmove[i]
    for i in range(enemies): positiony[i]=min(600,positiony[i]+positionymove[i])
  
    if falling:
      falling=False
      for posy in positiony:
        if posy&lt;600: falling=True
  
  
    if not falling:
      for i in range(enemies):
        for j in range(i+1,enemies):
          if abs(positionx[i]-positionx[j])&lt;20 and abs(positiony[i]-positiony[j])&lt;20:
            temp=positionxmove[i]
            positionxmove[i]=positionxmove[j]
            positionxmove[j]=temp
            temp=positionymove[i]
            positionymove[i]=positionymove[j]
            positionymove[j]=temp
  
      for i in range(enemies):  
        if positionx[i]&gt;600: positionxmove[i]*=-1
        if positionx[i]&lt;0: positionxmove[i]*=-1
        if positiony[i]&gt;440: positionymove[i]*=-1
        if positiony[i]&lt;0: positionymove[i]*=-1
  
      for i in range(enemies):
        if abs(positionx[i]-mousex)&lt;40 and abs(positiony[i]-mousey)&lt;40:
          falling = True
          finish = True
          #start = False
          endTime=time.localtime()
          score= (endTime[3]-strtTime[3])*3600 + (endTime[4]-strtTime[4])*60 + endTime[5]-strtTime[5]
          break
  
        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()
  
  
  
  
  game()
  </code></pre>
  
  <p>This is the error I get, I've changed quit() to QUIT but still no luck.</p>
  
  <pre><code>Traceback (most recent call last):
  File "C:\Users\MO\Desktop\Twerk\ballbounce_changed.py", line 171, in &lt;module&gt;
   game()
  File "C:\Users\MO\Desktop\Twerk\ballbounce_changed.py", line 160, in game
   for event in pygame.event.get():
   pygame.error: video system not initialized
  </code></pre>
  
  <p>thank you :) </p>