gistfile1.txt

#!
import turtle
wn = turtle.Screen()
alex = turtle.Turtle()
fibonacci_cache = {}

def fibonacci(n):
    #if we have cached the value, then return in it
    if n in fibonacci_cache:
        return fibonacci_cache[n]
    #compute Nth term
    if n == 1:
        value = 1
    elif n == 2:
        value = 1
    elif n > 2:
        value = fibonacci(n-1) + fibonacci(n - 2)

    #cache value and return it
    fibonacci_cache[n] = value

for n in range(1,200):
    alex.forward(fibonacci(n))
    aleft.left(fibonacci(n))