from turtle import forward, left, right, shape, exitonclick

shape('turtle')

a = 100
b = 100

for natoceni_zelvicky in 10, 20, 30, 40, 50, 60:
    
    print("natoceni_zelvicky = ", natoceni_zelvicky)
    
    forward(a)
    left(90)
    forward(b)
    left(90)
    forward(a)
    left(90)
    forward(b)
    left(90)

    left(natoceni_zelvicky)
    

print("hotovo")


exitonclick()