import pygame
import pygame.locals
import random

pygame.init()
sz = 100
screen=pygame.display.set_mode((3 * sz, 3 * sz))
pygame.display.set_caption('Drawing')

clr = (0, 0, 0)
wht = (255,255,255)

def draw():
  # clear screen
  screen.fill((255,255,255))

  # circle(surface, color, center, radius, width=0)
  pygame.draw.circle(screen, clr, (int(sz * 1.5), sz), int(sz * 0.5))

  pygame.draw.circle(screen, wht, (int(sz * 1.25), sz), int(sz * 0.24))
  pygame.draw.circle(screen, wht, (int(sz * 1.75), sz), int(sz * 0.24))

  pygame.draw.circle(screen, clr, (int(sz * 1.5), int(sz * 1.7)), int(sz * 0.5), 2)

  # rect(surface, color, rect) where rect = (left, top, width, height)
  pygame.draw.rect(screen, wht, (sz, sz, sz, int(sz * 0.7)))

  if (random.randint(1, 10) > 1):
    pygame.draw.circle(screen, clr, (int(sz * 1.25), sz), int(sz * 0.05))
    pygame.draw.circle(screen, clr, (int(sz * 1.75), sz), int(sz * 0.05))

  # line(surface, color, start_pos, end_pos)
  pygame.draw.line(screen, clr, (sz,         sz), (sz,         int(sz*1.7)), 2)
  pygame.draw.line(screen, clr, (sz * 2 - 2, sz), (sz * 2 - 2, int(sz*1.7)), 2)

  pygame.draw.line(screen, clr, (int(sz * 1.45), int(sz * 1.55)), (int(sz*1.5), int(sz*1.65)), 2)
  pygame.draw.line(screen, clr, (int(sz * 1.55), int(sz * 1.55)), (int(sz*1.5), int(sz*1.65)), 2)

clock = pygame.time.Clock()

running = True

while running:
  for event in pygame.event.get():
    if event.type == pygame.locals.QUIT:
      running = False
    # ignore all other events

  draw()

  pygame.display.update()

  # time delay
  # from the raspberry spoon game
  # https://www.pygame.org/docs/ref/time.html
  clock.tick(6)

pygame.quit()