docs: def on_draw():
  	global yrot
  	win.clear()
  	glLoadIdentity()
  	glTranslatef(0, 0, -100)
  	glRotatef(yrot, 0.0, 1.0, 0.0)
  	default_system.draw()
  	'''
  	glBindTexture(GL_TEXTURE_2D, 1)
  	glEnable(GL_TEXTURE_2D)
  	glEnable(GL_POINT_SPRITE)
  	glPointSize(100);
  	glBegin(GL_POINTS)
  	glVertex2f(0,0)
  	glEnd()
  	glBindTexture(GL_TEXTURE_2D, 2)
  	glEnable(GL_TEXTURE_2D)
  	glEnable(GL_POINT_SPRITE)
  	glPointSize(100);
  	glBegin(GL_POINTS)
  	glVertex2f(50,0)
  	glEnd()
  	glBindTexture(GL_TEXTURE_2D, 0)
  	'''