old_contents: import turtle
  
  def draw_square(some_turtle):
      for i in range(1, 5):
          some_turtle.forward(100)
          some_turtle.right(90)
  
  def draw_art():
      window = turtle.Screen()
      window.bgcolor("red")
      # Create turtle Brad - draw a square
      brad = turtle.Turtle()
      brad.shape("circle")
      brad.color("yellow")
      brad.speed(2)
      draw_square(brad)
      # Create turtle Angie - draw a circle
      angie = turtle.Turtle()
      angie.shape("arrow")
      angie.color("blue")
      angie.circle(100)
  
      window.exitonclick()
  
  draw_art()
  
new_contents: import turtle
  
  def draw_square(some_turtle):
      for i in range(1, 5):
          some_turtle.forward(100)
          some_turtle.right(90)
  
  def draw_art():
      window = turtle.Screen()
      window.bgcolor("red")
      # Create turtle Brad - draw a square
      brad = turtle.Turtle()
      brad.shape("circle")
      brad.color("yellow")
      brad.speed(2)
      # Call draw_square() 36 times to draw final shape
      for i in range(1, 37):
          draw_square(brad)
          brad.right(10)
  
      window.exitonclick()
  
  draw_art()
  
subject: Remove circle