title: How to change the background color of RawTurtle
body: <p>I wrote a python script, which should open a Tkinter window with a canvas and let turtle draw in this canvas. Now I want to change the background color of the canvas, but it stays always white (default settings of <code>RawTurtle</code>?). Is there any possibility to draw on a background with another color?</p>
  
  <pre><code>from Tkinter import *
  import turtle
  root = Tk()
  
  root.overrideredirect(1)
  
  ccanvas = Canvas(root, width = 800, height = 480)
  
  ccanvas.pack()
  
  turtle = turtle.RawTurtle(ccanvas)
  turtle = turtle.bgcolor("black")
  
  mainloop()
  </code></pre>
  
  <p>If I try <code>turtle = turtle.bgcolor("black")</code> the error looks like this: <code>'RawTurtle' object has no attribute 'bgcolor'</code>.</p>