A simple drawing program

from Tkinter import *
import turtle

root=Tk()
root.title('Steves drawing machine')

can= Canvas(root, width=400,height=300)
can.pack()

def clickhandler(x,y):
    t.goto(x,y)

t=turtle.RawTurtle(can)

screen=t.getscreen()
screen.setworldcoordinates(0,0,400,400)
screen.onclick(clickhandler)

root.mainloop()