input: Write a python function to get the number of vertices, faces, colors, and edges of the `Object3D` class.
  ```python
  def get_object3d_attributes(obj):
      return len(obj.vertices), len(obj.faces), len(obj.colors), len(obj.edges)
  
  # Testing the function
  obj = Object3D()
  assert get_object3d_attributes(obj) == (8, 4, 6, 12)
output: def get_object3d_attributes(obj):
      return len(obj.vertices), len(obj.faces), len(obj.colors), len(obj.edges)