def drawSmileyFace():
  face = makeEmptyPicture(400, 400, white)
  for j in range(1, 401, 40):
    for i in range(1, 401, 80):
      if (j/40) % 2 == 1:
        face.addRectFilled(black, i, j, 40, 40)
      else:
        face.addRectFilled(black, i+40, j, 40, 40)  
  #Start of Solution to Question 7

  #End of Solution to Question 7  (you can see the resulting image in drawn-by-q7.jpg)
  show(face)