This classical shape can be programmed easily with a for loop.
Animation of this drawing can be found here:
Code:
import turtle
import colorsys
turtle.setup(700,700)
turtle.title("Spiral - PythonTurtle.Academy")
turtle.speed(0)
turtle.hideturtle()
n=200
s=2
for i in range(n):
turtle.fd(s)
turtle.left(119)
s += 2