import turtle

ablak = turtle.Screen()
teki = turtle.Turtle()
teki.speed(0)

oldal = 180
for szin in ["red", "blue", "yellow", "green", "purple", "orange", "cyan", "grey", "pink", "gold", "navy", "olive"]:
    teki.color("black", szin)
    teki.begin_fill()
    for j in range(4):
        teki.forward(oldal)
        teki.left(90)
    teki.end_fill()
    oldal = oldal - 15
    teki.left(50)
ablak.mainloop()