input: 
  def fibonacci_sequence(n: int) -> List[int]:
      """ Generate a Fibonacci sequence as a list of integers up to n elements.
      >>> fibonacci_sequence(5)
      [0, 1, 1, 2, 3]
      >>> fibonacci_sequence(10)
      [0, 1, 1, 2, 3, 5, 8, 13, 21, 34]
      """
      if n <= 0:
          return []
      
      fib_list = [0] * n
      fib_list[0] = 0
      
      if n > 1:
          fib_list[1] = 1
      
      for i in range(2, n):
          fib_list[i] = fib_list[i-1] + fib_list[i-2]
      
      return fib_list
  
output:     
      if n <= 0:
          return []
      
      fib_list = [0] * n
      fib_list[0] = 0
      
      if n > 1:
          fib_list[1] = 1
      
      for i in range(2, n):
          fib_list[i] = fib_list[i-1] + fib_list[i-2]
      
      return fib_list
  