title: How to set two versions of text colours in raspberry Pi using joystick to switch?
body: <pre><code>from sense_hat import SenseHat
  sense=SenseHat()
   
  def black():
      sense.clear(0,0,0)
  
  def white():
      sense.clear(255,255,255)
  
  sense.stick.direction_left=sense.show_message(text_colour=black,back_colour=white,scroll_speed=0.05)
  
  sense.stick.direction_right=sense.show_message(text_colour=white,back_colour=black,scroll_speed=0.05)
  
  
  while True:
      print (&quot;Hello World&quot;)
  </code></pre>
  <p>The system shows: <code>TypeError:show_message() missing 1 required positional argument:text_string</code></p>
  <p>Wondering what I am missing?</p>