Indian Flag drawn by turtles

"""
script: Indian Flag

Created on Sat Jun 21 16:51:56 2014
    @author: Naren
"""

import turtle
#function for drawing Ashoka wheel
def create_wheel(t,r):
    t.begin_fill()
    for i in range(1,25):
        t.fd(r)
        t.home()
        t.seth(i*15)
    t.fd(r)
    t.seth(-90)
    t.circle(-r)
    t.end_fill()
    t.hideturtle()

#function for drawing Color blocks
def draw_block(t,pos,r):
    print pos
    t.pu()
    t.setpos(pos)
    t.pd()
    t.begin_fill()
    for i in range(2):
        t.fd(10*r)
        t.rt(90)
        t.fd(2*r)
        print 2*r
        t.rt(90)
    t.end_fill()
    t.hideturtle()
#intializations for screen and wheel turtle
s=turtle.Screen()
t=turtle.Turtle()
t.speed(0)
s.bgcolor('black')
s.screensize(320,240)
t.color('blue','white')
t.pensize(5)
r=70

#turtles for creating three color blocks and Ashoka Chakra

upt=turtle.Turtle()
upt.color('orange','orange')
mid=turtle.Turtle()
mid.color('white','white')
bott=turtle.Turtle()
bott.color('green','green')
draw_block(upt,(-5*r,3*r),r)
draw_block(mid,(-5*r,r),r)
draw_block(bott,(-5*r,-r),r)
create_wheel(t,r)
mid.pu()
mid.setpos((-5*r,-3*r))
mid.pensize(5)
mid.pd()
mid.rt(90)
mid.fd(r)

s.exitonclick()