Problems with Tkinter, Canvas and Pythonwin

[Heinz Folker]

I want to write a little very simple turtle-gaphic. The window where you
can write is a canvas.
My problem:
I want to command the turtles with the interpreter (the interactive
window in Pythonwin), in order to use loops and recursions. After the
canvas is opened the interpreter does not react to any of my commands.
I think the problem is calling the mainloop function of Tkinter, but I
don't know how to solve this problem