old_contents: #!/bin/python
  
  from grid import Grid
  import time
  
  initial_time = time.time()
  grid = Grid(30)
  grid.create_new_random_matrix()
  print("Initial matrix:")
  print(grid.to_str())
  initial_average = grid.get_average()
  print("Initial average: {}".format(initial_average))
  print("\n")
  iterations = 0
  while grid.get_max_delta() > 0.0001:
      average_grid = grid.calculate_average_grid()
      grid.set_matrix(average_grid.get_matrix())
      iterations += 1
  
  print("Final matrix:")
  print(grid.to_str())
  print("With {0} iterations in {1:.3f} milliseconds".format(
      iterations, (time.time() - initial_time) * 1000.0))
  print("Difference of averages: {}".format(
      abs(initial_average - grid.get_average())))
  
new_contents: #!/bin/python
  
  from grid import Grid
  import time
  
  GRID_SIZE = 30
  
  initial_time = time.time()
  grid = Grid(GRID_SIZE)
  grid.create_new_random_matrix()
  print("Initial matrix:")
  print(grid.to_str())
  initial_average = grid.get_average()
  print("Initial average: {}".format(initial_average))
  print("\n")
  iterations = 0
  while grid.get_max_delta() > 0.0001:
      average_grid = grid.calculate_average_grid()
      grid.set_matrix(average_grid.get_matrix())
      iterations += 1
  
  print("Final matrix:")
  print(grid.to_str())
  print("With {0} iterations in {1:.3f} milliseconds".format(
      iterations, (time.time() - initial_time) * 1000.0))
  print("Difference of averages: {}".format(
      abs(initial_average - grid.get_average())))
  
subject: Add grid size constant