code: def draw(self, current_time, frame_time):
          
          self.set_default_viewport()
          self.timeline.draw(current_time, frame_time, self.fbo)
docs: Draws a frame. Internally it calls the
          configured timeline's draw method.
  
          Args:
              current_time (float): The current time (preferrably always from the configured timer class)
              frame_time (float): The duration of the previous frame in seconds