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To: MicroWorlds Forum <mwforum@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>
Subject: Re: checking if turtle is hidden
From: Alain Tougas <alain@xxxxxxx>
Date: Wed, 1 Jun 2011 06:31:20 -0400

Use GET instead of SET.


Le 2011-06-01 à 03:00, zehava wizman a écrit :

> Hello Forum
> I want to know how can I check some condition if two turtles are hidden or
> not , and according to this condition, do something
>  I tries to write thos proc:
>  
> to test
> if and (set "t1 "visible? "true) ("t2 "visible? "true)[ announce [hello]]
> 
> end
> 
>   
> it's doesn't work.
> 
> thanks, Zehava
> 


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