import turtle as t t.speed(-100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000) t.pensize(1) s = ['black','yellow'] for x in range(300): t.forward(x) t.color(s[x % 2]) t.left(60)