import matplotlib.pyplot as plt
from matplotlib.animation import FuncAnimation
from matplotlib.widgets import Slider

fig, ax = plt.subplots(3, 1, height_ratios=[4, 1, 1])

texts = []
for i, arrow in enumerate(['larrow', 'rarrow', 'darrow']):
    texts.append(
        ax[0].text(0.5, 0.3*i + 0.2, 'Arrow', ha='center', size=16,
                   bbox=dict(boxstyle=f"{arrow}, pad=0.3, head_angle=150")))


def update_head_angle(value):
    for t in texts:
        t.get_bbox_patch().get_boxstyle().head_angle = value
    fig.canvas.draw_idle()


def update_head_width(value):
    for t in texts:
        t.get_bbox_patch().get_boxstyle().head_width = value
    fig.canvas.draw_idle


angle_slider = Slider(ax[1], 'Angle', 0, 360, valinit=150, closedmin=False)
angle_slider.on_changed(update_head_angle)

width_slider = Slider(ax[2], 'Width', 0, 3, valinit=1.5)
width_slider.on_changed(update_head_width)

plt.show()