text: # A module for drawing a chart with the turtle
  import turtle  # import module
  
  # Define window size as constants
  window = turtle.Screen()  # create a window for the turtle to draw on
  window.title("Turtle Demo")  # the title to show at the top of the window
  # WINDOW_WIDTH = 400  # size constants for easy changing
  # WINDOW_HEIGHT = 300
  WINDOW_WIDTH = 400  # size constants for easy changing
  WINDOW_HEIGHT = 300
  window.setup(WINDOW_WIDTH, WINDOW_HEIGHT)  # set window size (width, height)
  window.setworldcoordinates(0, 0, WINDOW_WIDTH, WINDOW_HEIGHT)  # coord system
  # Create the turtle
  my_turtle = turtle.Turtle()
  my_turtle.speed("slow")  # how fast the turtle should move
  
  # #Draw a line...y-axis? 
  # my_turtle.home()
  # my_turtle.left(90)
  # my_turtle.pendown()
  # my_turtle.forward(WINDOW_HEIGHT - 50)
  # #Draw a line...x-axis? 
  # my_turtle.home()
  # #my_turtle.left(90)
  # my_turtle.pendown()
  # my_turtle.forward(WINDOW_WIDTH - 50)
  
  # ##Move the turtle to draw
  # my_turtle.home()
  # my_turtle.penup()       # do not draw while moving
  # my_turtle.goto(30, 60)  # walk to coordinates
  # my_turtle.pendown()     # start drawing again
  # my_turtle.forward(80)   # move forward
  # my_turtle.left(60)      # turn left
  # my_turtle.forward(120)  # move forward
  # my_turtle.right(120)    # turn left
  # my_turtle.forward(120)  # move forward
  
  # my_turtle.home()
  # my_turtle.pendown()       # do not draw while moving
  # my_turtle.left(90)      # turn left
  # my_turtle.forward(100)  # move forward
  # my_turtle.right(90)    # turn left
  # my_turtle.forward(20)  # move forward
  # my_turtle.right(90)  
  # my_turtle.forward(100)  # move forward
  # my_turtle.right(90)    # turn left
  # my_turtle.forward(20)
  
  filename = 'data/sample_data.txt'
  with open(filename) as file: 
      count = 0
      for line in file: 
          my_turtle.color("purple")
          my_turtle.pendown()
          my_turtle.begin_fill()
          my_turtle.left(90)
          my_turtle.forward(100)
          my_turtle.right(90)
          my_turtle.forward(20)
          my_turtle.right(90)
          my_turtle.forward(100)
          my_turtle.right(90)
          my_turtle.forward(20)
          my_turtle.end_fill()
          my_turtle.penup()
          my_turtle.right(180)
          my_turtle.forward(20 + 10)
  
  # Make turtle graphics appear and run; wait for the user to close the screen
  # This MUST be the last statement executed in the script
  window.mainloop()
  
  
  # 1. Update Speed, Update width, height = 800, 500
  # 1.1 Update Speed, update coord: -20, -20
  # 2. Draw y
  # 3. Draw x
  
  
  