import tkinter as tk

# Souradnice dvou protilehlych vrcholu obdelniku
x1, y1 = 100, 50
x2, y2 = 330, 200

# Vytvoreni hlavniho okna a platna
root = tk.Tk()
root.title("Baliky")  # Nastaveni nazvu okna
canvas = tk.Canvas(root, width=500, height=500)
canvas.pack()

# Nakresleni obdelniku
canvas.create_rectangle(x1, y1, x2, y2)

# Oznaceni vrcholu obdelniku pismeny (A, B, C, D)
canvas.create_text(x1, y1, text="A", anchor=tk.SE)
canvas.create_text(x2, y1, text="B", anchor=tk.SW)
canvas.create_text(x2, y2, text="C", anchor=tk.NW)
canvas.create_text(x1, y2, text="D", anchor=tk.NE)

# Spusteni hlavni smycky
root.mainloop()