text: #!/usr/bin/python
  import sys
  from sense_hat import SenseHat
  
  # To get good results with the magnetometer you must first calibrate it using
  # the program in RTIMULib/Linux/RTIMULibCal
  # The calibration program will produce the file RTIMULib.ini
  # Copy it into the same folder as your Python code
  
  led_loop = [4, 5, 6, 7, 15, 23, 31, 39, 47, 55, 63, 62, 61, 60, 59, 58, 57, 56, 48, 40, 32, 24, 16, 8, 0, 1, 2, 3]
  
  sense = SenseHat()
  sense.set_rotation(0)
  sense.clear()
  
  prev_x = 0
  prev_y = 0
  
  led_degree_ratio = len(led_loop) / 360.0
  
  while True:
      dir = sense.get_compass()
      dir_inverted = 360 - dir  # So LED appears to follow North
      led_index = int(led_degree_ratio * dir_inverted)
      offset = led_loop[led_index]
  
      y = offset // 8  # row
      x = offset % 8  # column
  
      if x != prev_x or y != prev_y:
          sense.set_pixel(prev_x, prev_y, 0, 0, 0)
  
      sense.set_pixel(x, y, 0, 0, 255)
  
      prev_x = x
      prev_y = y
  