input: Write a python function to add two vectors element-wise in steps of 4.
  assert get_sum([1, 2, 3, 4, 5], [10, 20, 30, 40, 50]) == [11, 22, 33, 44, 15]
  assert get_sum([0, 0, 0, 0], [1, 1, 1, 1]) == [1, 1, 1, 1]
  assert get_sum([5, 6, 7, 8, 9, 10], [10, 20, 30, 40, 50, 60]) == [15, 26, 37, 48, 59, 70]
output: def get_sum(vector1, vector2):
      return [vector1[i] + vector2[i] for i in range(len(vector1))]