new_contents: import pygame, sys
  from pygame.locals import *
  
  WIDTH   = 309
  HEIGHT  = 199
  SCALE   = 3
      
  def main():
      pygame.init()
      pygame.display.set_caption("Spritesheet Tool")
      image = pygame.transform.scale(pygame.image.load('invader.png'), (WIDTH*SCALE, HEIGHT*SCALE))
      DISPLAYSURF = pygame.display.set_mode((WIDTH*SCALE, HEIGHT*SCALE))
      
      while True:
          for event in pygame.event.get():
              if event.type == QUIT:
                  pygame.quit()
                  sys.exit()
              if event.type == MOUSEBUTTONUP:
                  print (event.pos[0] / SCALE), (event.pos[1] / SCALE)
                  
          DISPLAYSURF.blit(image, (0, 0))
          pygame.display.update()
          
  
  if __name__ == '__main__':
      main()
subject: Add spritesheet_tool