def _render_pulse(
        self, console: Console, width: int, ascii: bool = False
    ) -> Iterable[Segment]:
        """Renders the pulse animation.

        Args:
            console (Console): Console instance.
            width (int): Width in characters of pulse animation.

        Returns:
            RenderResult: [description]

        Yields:
            Iterator[Segment]: Segments to render pulse
        """
        fore_style = console.get_style(self.pulse_style, default="white")
        back_style = console.get_style(self.style, default="black")

        pulse_segments = self._get_pulse_segments(
            fore_style, back_style, console.color_system, console.no_color, ascii=ascii
        )
        segment_count = len(pulse_segments)
        current_time = (
            monotonic() if self.animation_time is None else self.animation_time
        )
        segments = pulse_segments * (int(width / segment_count) + 2)
        offset = int(-current_time * 15) % segment_count
        segments = segments[offset : offset + width]
        yield from segments
Renders the pulse animation.

        Args:
            console (Console): Console instance.
            width (int): Width in characters of pulse animation.

        Returns:
            RenderResult: [description]

        Yields:
            Iterator[Segment]: Segments to render pulse
        
rich/progress_bar.py