input: Write a function to design a positive feedback loop for a given Python program. The function should take a list of Python statements as input and return the modified list with a positive feedback mechanism implemented. If the input list is empty, the function should return an empty list.
  
  def positive_feedback_loop(statements):
      if not statements:
          return []
      modified_statements = statements[:-1] + [statements[-1] + "\n    i += 1\n    if i == 10:\n        print(\"You've got it!\")"]
      return modified_statements
  
  assert positive_feedback_loop(["for i in range(10):\n    print(\"hello\")"]) == ["for i in range(10):\n    print(\"hello\")\n    i += 1\n    if i == 10:\n        print(\"You've got it!\")"]
  assert positive_feedback_loop([]) == []
output: def positive_feedback_loop(statements):
      if not statements:
          return []
      modified_statements = statements[:-1] + [statements[-1] + "\n    i += 1\n    if i == 10:\n        print(\"You've got it!\")"]
      return modified_statements