netlogo - How to draw patches situated in crossroads? -

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How do the patch located in the intersection (the roads are drawn in white) as the picture below Can I attract / P>

Here is the beginning of the code: 

  with question ([pcolor = white] and (pxcor mod (nb-patch-length + 1) = 0) and (Pycor Mod (nb-patch-width + 1) = 0)] [set pcolor red]

Thanks in advance for your help.

Enter image details here

< Div class = "post-text" itemprop = "text">

How about this? (Suppose roads have a patch in width and always horizontal or vertical.) 

  with question [all? Neighbors 4 [pcolor = white]] [set pcolor red]

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