import tkinter
import random
root = tkinter.Tk()
root.title("UFO zpráva")
canvas = tkinter.Canvas(root, width=360, height=240)
canvas = tkinter.Canvas(width=360, height=240)
canvas.pack()

for _ in range(256):
    row = random.randint(0, 11)
    col = random.randint(0, 17)
    x = col * 20 + 10
    y = row * 20 + 10
    width = random.randint(1, 20)
    height = random.randint(1, 20)
    canvas.create_oval(x-width/2, y-height/2, x+width/2, y+height/2)

root.mainloop()