def mplt_bars(ax, ticks, values, colors, ylabel=None, title=None):
    """Quick function for creating stacked matplotlib barplot"""
    bar0 = ax.bar(ticks, values[0], color=colors[0])
    bar1 = ax.bar(ticks, values[1], bottom=values[0], color=colors[1])
    if ylabel is not None:
        ax.set_ylabel(ylabel)
    if title is not None:
        ax.set_title(title)
    return bar0, bar1