Graph the collatz conjecture using Turtle

collatz.py

import turtle as Turtle
def sequence(n):
    steps = 0
    while n != 1:
        if n % 2 == 0:
            n = n / 2
            steps += 1
        else:
            n = n*3 + 1
            steps += 1
    return steps

Turtle.setup()
Turtle.screensize(2000, 2000, "white")
turtle = Turtle.Turtle()
turtle.speed(0)
max = 0
for i in range(10000):
    steps = sequence(i + 1)
    if steps > max: max = steps
    turtle.pd()
    turtle.color("blue")
    turtle.fd(1)
    turtle.color("black")
    turtle.pu()
    if i % 2:
        canvaswidth = 2000+(i*2)
        canvasheight = 2000 + max*2
        Turtle.screensize(canvaswidth, canvasheight, "white")
        ts = Turtle.getscreen().getcanvas()
        screen = Turtle.getscreen()
        winwidth = screen.window_width()
        ts.xview_moveto((((canvaswidth-winwidth)/2)/canvaswidth)+(i/canvaswidth))
    turtle.lt(90)
    turtle.fd(steps)
    turtle.rt(90)
    turtle.pd()
    turtle.fd(1)
    turtle.pu()
    turtle.rt(180)
    turtle.fd(1)
    turtle.lt(90)
    turtle.fd(steps)
    turtle.lt(90)
Turtle.mainloop()