import random, turtle, colorsys
R = 0
G = 0
B = 0


wn = turtle.Screen()
frank = turtle.Turtle()
frank.speed(0.2)
frank.pensize(2)

def randomPattern(length, n):
    R = random.randint(0,100) / 100
    G = random.randint(0,100) / 100
    B = random.randint(0,100) / 100
    frank.pencolor(R,G,B)
    frank.forward(length)
    frank.left(150)
    frank.forward(length)
    frank.left(150)
    if n != 0:
        randomPattern(length - 5, n - 1)

randomPattern(300, 1000)
input= input("pause")