input: 
  from typing import List
  
  def Fibonacci_sequence(n: int) -> List[int]:
      """ Generate and return a list containing the first n numbers in the Fibonacci sequence.
      
      >>> Fibonacci_sequence(1)
      [0]
      >>> Fibonacci_sequence(2)
      [0, 1]
      >>> 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 []
      elif n == 1:
          return [0]
      elif n == 2:
          return [0, 1]
      else:
          fib_sequence = [0, 1]
          for i in range(2, n):
              fib_sequence.append(fib_sequence[-1] + fib_sequence[-2])
          return fib_sequence
  
output:     if n <= 0:
          return []
      elif n == 1:
          return [0]
      elif n == 2:
          return [0, 1]
      else:
          fib_sequence = [0, 1]
          for i in range(2, n):
              fib_sequence.append(fib_sequence[-1] + fib_sequence[-2])
          return fib_sequence