Python Turtle Graphics Drawing - Pepsi Logo

 Python Turtle Graphics Drawing - Pepsi Logo

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Bézier curve algorithm is from wikipedia: 

Source code:

from turtle import *

from math import atan2,degrees

D = 0.1 #bezier step

R = '#ED1B38'

B = '#005993'

W = '#FFFFFF'

K = '#000000'

def Bez(a,b,c,d):

    up()

    goto(a)

    down()

    t = 0.0

    while t <= 1.0:

        t3 = t**3

        t2 = t**2

        f1 = -t3+3*t2-3*t+1

        f2 = 3*t3-6*t2+3*t

        f3 = -3*t3+3*t2

        f4 = t3

        x = a[0]*f1+ b[0]*f2 + c[0]*f3 + d[0]*f4

        y = a[1]*f1 + b[1]*f2 + c[1]*f3 + d[1]*f4

        d1 = -3*t2+6*t-3

        d2 = 9*t2-12*t+3

        d3 = -9*t2+6*t

        d4 = 3*t2

        dx = a[0]*d1+ b[0]*d2 + c[0]*d3 + d[0]*d4

        dy = a[1]*d1 + b[1]*d2 + c[1]*d3 + d[1]*d4

        angr = atan2(dy,dx)

        seth(degrees(angr))

        goto(x, y)

        t+=D

    goto(d)

def Pepsi(sz):

    color(W)

    up()

    seth(0)

    fd(sz)

    lt(90)

    down()

    begin_fill()

    circle(sz)

    end_fill()

    up()

    color(R)

    lt(90)

    fd(sz)

    rt(126.7)

    fd(sz*0.95)

    lt(90)

    down()

    begin_fill()

    circle(sz*0.95,163.1)

    p = pos()

    pts = [p,p+(sz*0.74275,sz*0.2308),p+(sz*1.14545,sz*0.74895),p+(sz*1.33245,sz*1.32555)]

    Bez(*pts)

    end_fill()

    up()

    color(B)

    seth(233.3)

    fd(sz*0.95)

    rt(13.3)

    fd(sz*0.95)

    lt(90)

    down()

    begin_fill()

    circle(sz*0.95,173)

    p = pos()

    pts = [p,p+(sz*0.10705,sz*-0.35325),p+(sz*-0.0774,sz*-0.6761),p+(sz*-0.38725,sz*-0.8211)]

    Bez(*pts)

    p = pos()

    pts = [p,p+(sz*-0.23155,sz*-0.10975),p+(sz*-0.70985,sz*-0.1699),p+(sz*-1.138,sz*-0.30585)]

    Bez(*pts)

    end_fill()

    up()

setup(640,650)

bgcolor(K)

Pepsi(300)

hideturtle()

done()