[Pharo-users] Rendering in Glamour

I am trying to use the Glamour and as I first step I copied the code provided in the examples and pasted it in a new class called tree browser. I then tried to execute this in my workspace: |browser accum renderer| browser := TreeBrowser new. accum := browser accumulator. renderer := GLMMorphicRenderer new. accum renderGlamorouslyOn: renderer. I thought that executing this would give a window or something but it didn't and I can't figure out how to do so. I don't get any error message or anything. How is it supposed to show a window on the screen? Is there some other command I have to add to display the window? Thank you :)