text: #!~/envs/udacity-python-env
  
  import turtle
  
  
  def draw_square():
      brad = turtle.Turtle()
      brad.shape("turtle")
      brad.color("yellow")
      brad.speed(2)
  
      for i in range(0, 4):
          brad.forward(100)
          brad.right(90)
  
  
  def draw_circle():
      angie = turtle.Turtle()
      angie.shape("arrow")
      angie.color("blue")
      angie.circle(100)
  
  
  def draw_triangle():
      angle = turtle.Turtle()
      angle.shape("arrow")
  
      for i in range(0, 3):
          angle.forward(60)
          angle.left(120)
  
  
  def draw_shapes():
      window = turtle.Screen()
      window.bgcolor("red")
  
      draw_square()
  
      draw_circle()
  
      draw_triangle()
  
      window.exitonclick()
  
  
  draw_shapes()
  