text: import pygame as pg
  from utube_1st_tutorial_1st import posx
  from utube_1st_tutorial_1st import posy
  from utube_1st_tutorial_1st import cwidth
  from utube_1st_tutorial_1st import cheight
  
  global swidth
  global sheight
  
  swidth = 640
  sheight = 480
  
  global screen
  screen = pg.display.set_mode((swidth,sheight))
  global time
  time = pg.time.Clock()
  pg.display.set_caption("Title")
  
  global bubble_surface
  bubble_surface = pg.Surface((20, 20))
  
  for i in range(0,255):
      for j in range(0,20):
          for n in range(0,5):
              pg.draw.circle(bubble_surface, (100, 100, 100, i), (j, j), n)
              screen.blit(bubble_surface, (posx, posy))
  