code: def draw_time_marker(self):
          
          self._time_marker_image = self._canvas_ticks.create_image((2, 16), image=self._time_marker)
          self._time_marker_line = self._timeline.create_line(
              (2, 0, 2, self._timeline.winfo_height()), fill="#016dc9", width=2)
          self._timeline.lift(self._time_marker_line)
          self._timeline.tag_lower("marker")
docs: Draw the time marker on the TimeLine Canvas