input: Write a python function to search for a color in a predefined list and return a message indicating whether the color exists or not.
  assert search_colors("red") == "The color exists in the list."
  assert search_colors("black") == "The color does not exist in the list."
  assert search_colors("green") == "The color exists in the list."
output: def search_colors(color):
      colors_list = ["red", "green", "blue", "yellow", "white"]
      if color in colors_list:
          return "The color exists in the list."
      else:
          return "The color does not exist in the list."