input: def print_pattern() -> None:
      """
      Print a pattern of stars in a specific form. First, print a right-angled triangle 
      with increasing rows of stars, starting from 1 star in the first row to 5 stars in 
      the last row. Then, print another right-angled triangle with decreasing rows of 
      stars, starting from 5 stars in the first row to 1 star in the last row.
  
      Example:
      >>> print_pattern()
      *
      **
      ***
      ****
      *****
      *****
      ****
      ***
      **
      *
      """
output:     for i in range(1, 6):
          print('*' * i)
      for i in range(5, 0, -1):
          print('*' * i)