text: """
   * Setup and Draw.
   *
   * The code inside the draw() function runs continuously
   * from top to bottom until the program is stopped.
   """
  y = 100
  
  
  def setup():
      """
      The statements in the setup() function
      execute once when the program begins
      """
      size(640, 360)    # Size must be the first statement
      stroke(255)         # Set line drawing color to white
      frameRate(30)
  
  
  def draw():
      """
      The statements in draw() are executed until the
      program is stopped. Each statement is executed in
      sequence and after the last line is read, the first
      line is executed again.
      """
      background(0)     # Set the background to black
      y = y - 1
      if y < 0:
          y = height
  
      line(0, y, width, y)
  
  