old_contents: import pygame, sys
  from pygame.locals import *
  
  pygame.init()
  DISPLAYSURF = pygame.display.set_mode((400, 300))
  pygame.display.set_caption('Hello World!')
  
  WHITE = (255, 255, 255)
  GREEN = (  0, 255,   0)
  BLUE  = (  0,   0, 128)
  
  fontObj = pygame.font.Font('c:\\Windows\\fonts\\gulim.ttc', 32)
  textSurfaceObj = fontObj.render('Hello world!', True, GREEN, BLUE)
  textRectObj = textSurfaceObj.get_rect()
  textRectObj.center = (200, 150)
  
  while True: # main game loop
      DISPLAYSURF.fill(WHITE)
      DISPLAYSURF.blit(textSurfaceObj, textRectObj)
      for event in pygame.event.get():
          if event.type == QUIT:
              pygame.quit()
              sys.exit()
      pygame.display.update()
  
  
new_contents: import pygame, sys
  from pygame.locals import *
  import os
  
  pygame.init()
  DISPLAYSURF = pygame.display.set_mode((400, 300))
  pygame.display.set_caption('Hello World!')
  
  WHITE = (255, 255, 255)
  GREEN = (  0, 255,   0)
  BLUE  = (  0,   0, 128)
  
  fontObj = pygame.font.Font(os.environ['systemroot']+'\\fonts\\gulim.ttc', 32)
  textSurfaceObj = fontObj.render('Hello world!', True, GREEN, BLUE)
  textRectObj = textSurfaceObj.get_rect()
  textRectObj.center = (200, 150)
  
  while True: # main game loop
      DISPLAYSURF.fill(WHITE)
      DISPLAYSURF.blit(textSurfaceObj, textRectObj)
      for event in pygame.event.get():
          if event.type == QUIT:
              pygame.quit()
              sys.exit()
      pygame.display.update()
  
  
subject: make to use environment variable in path