Thank you for your help.
I miss find it.

I would like to delete a button of scene object.
How do I make a source code to delete it?
There is no information about it.

I am sorry for less information.
I would like to delete a button in the following case.

from scene import *
class MyScene (Scene):
def setup(self):
pass
def draw(self):
background(0, 0, 0)
run(MyScene())

I can watch only 'x button' on the screen.
I would like to delete this button because I want to prepare other close button by my self.
I already check other sample and open source such as GitHub.
But there is no same case of situation and document.