code: def create_image(mode="RGB", size=(200, 200), color=(155, 155, 155)):
      """
      target: create image with specified properties
      method:  use PIL image module
      expected: return image obj
      """
      img = Image.new(mode, size, color)
  
      return img
  
imports: import os
  from towhee.utils.pil_utils import PILImage
label_desc: Use image node_id 1 for calling a global function with example usage: create_image(mode, size, color) and returns: img