import tkinter
import random
canvas=tkinter.Canvas(width=600, height=600, bg='white')
canvas.pack()

cislo=0
pokus=0

velkost=30
x=300
y=200

while cislo < 6:
        
    cislo=random.randint(1, 6)
    farby=['yellow', 'red', 'blue', 'green', 'grey', 'purple']
    farba=random.choice(farby)
    pokus= pokus + 1

    canvas.create_rectangle(x-velkost,y-velkost,x+velkost,y+velkost)
    canvas.create_text(x,y,text=cislo, font='Arial 30 bold', fill=farba)
    canvas.update()
    canvas.after(600)
    canvas.create_text(x,y,text=cislo, font='Arial 30 bold', fill='white')
    
    if cislo==6:
        print('číslo 6 padlo na pokus číslo :', pokus)
        break