input: Write a python function to generate the Fibonacci sequence.
  assert fibonacci_sequence(5) == [1, 1, 2, 3, 5]
  assert fibonacci_sequence(10) == [1, 1, 2, 3, 5, 8, 13, 21, 34, 55]
  assert fibonacci_sequence(0) == []
output: def fibonacci_sequence(n):
      if n == 0:
          return []
      elif n == 1:
          return [1]
      
      sequence = [1, 1]
      while len(sequence) < n:
          sequence.append(sequence[-1] + sequence[-2])
      return sequence