# tk_almond_shapist.py

# tk_almond_shapist.py

import tkinter as tk
from PIL import Image, ImageDraw, ImageTk

W = 100
H = 100

def update(val):
    y = int(val)

    im = Image.new("L", (W, H), 255)

    d = ImageDraw.Draw(im)

    top = half.crop((0, 0, W, H//2-y))
    im.paste(top, (0, 0))

    bottom = top.transpose(Image.FLIP_TOP_BOTTOM)
    im.paste(bottom, (0, H//2-y))

    tkimg = ImageTk.PhotoImage(im)
    label.config(image=tkimg)
    label.image = tkimg

root = tk.Tk()
root.title("tk_almond_shape.py")

half = Image.new("L", (W, H), 255)
d = ImageDraw.Draw(half)
d.pieslice((-50, 0, W*1.5, W*1.5), 180, 360, fill=0)

im0 = Image.new("L", (W, H), 255)
tkimg0 = ImageTk.PhotoImage(im0)
label = tk.Label(root, image=tkimg0, bg='white')
label.pack()

slider = tk.Scale(root, from_=0, to=100, orient="horizontal", command=update)
slider.pack(fill="x")

root.mainloop()