How to use the bioframe.arrops.stack_intervals function in bioframe

show_coords : bool
        If True, plot x-ticks.

    figsize : (float, float) or None.
        The size of the figure. If None, plot within the current figure.

    """

    starts = np.asarray(starts)
    ends = np.asarray(ends)

    if figsize is not None:
        plt.figure(figsize=figsize)

    if levels is None:
        levels = arrops.stack_intervals(starts, ends)
    else:
        levels = np.asarray(levels)

    if isinstance(colors, str) or (colors is None):
        colors = itertools.cycle([colors])
    else:
        colors = itertools.cycle(colors)

    if isinstance(labels, str) or (labels is None):
        labels = itertools.cycle([labels])
    else:
        labels = itertools.cycle(labels)

    for i, (start, end, level, color, label) in enumerate(
        zip(starts, ends, levels, colors, labels)
    ):