Cool turtle

"""
This is an example of the package: turtle
"""

import turtle

allen = turtle.Turtle()

wn = turtle.Screen()
wn.title("Allen")
wn.colormode(255)
wn.bgcolor(0,0,0)

allen.speed(0)
allen.color()

#Polygon with 2 parameters (num sides, side lengh)
def poly(numSides, sideLength):
      for i in range(numSides):
            allen.forward(sideLength)
            allen.right(360/numSides)
a = 30
b = 3
counter = 0  #accumulator
red = 255
green = 255
blue = 255

#Standard FOR loop
for i in range(1000):
      poly(b, a)
      b += 1
      allen.right(40)
      allen.color(red,green,blue)
      if (counter%2 == 0):
            blue -= 10
      red -= 10
      counter += 1