code: def draw_timeline(self):
          
          # Configure the canvas
          self.clear_timeline()
          self.create_scroll_region()
          self._timeline.config(width=self.pixel_width)
          self._canvas_scroll.config(width=self._width, height=self._height)
          # Generate the Y-coordinates for each of the rows and create the lines indicating the rows
          self.draw_separators()
          # Create the markers on the timeline
          self.draw_markers()
          # Create the ticks in the _canvas_ticks
          self.draw_ticks()
          self.draw_time_marker()
docs: Draw the contents of the whole TimeLine Canvas