Hi Ned,

Thanks for your response.

Basically what I have is a SystemWindow which displays a picture, followed 
by a fixed delay, and then a caption. This is repeated for a whole 
collection of picture-caption pairs. 

I tried stepping, where at each step I change the current picture to the 
next one in the collection. Is this the right idea? (This doesn't 
currently work, but I probably need to give it some more time). Also, is 
there some place I can read up on stepping in general? I have only seen it 
applied in an example Edgar sent me. 

Thanks,
Regards,
Bilal 



> * Assuming you're using Morphic, use a step method. It doesn't have to 
> be to a Morph; you can tell the World to start stepping any arbitrary 
> selector with arbitrary arguments at a given rate. This is much 
> better and the rest of the UI will still work.



> * Make a background task, and then arrange to communicate between it 
> and the user interface somehow. This will still probably either 
> require stepping on the Morphic side or addDeferredUIMessage: (look 
> up senders of it).
> 
>