Hi, Offray,

I have not idea how to refer to patchRed object. This patch was already added and renamed, but I don't know how to "link" the red population turtle with a specific patch. Same for blue turtle population and patchBlue.

If I understand the question correctly... Do you know the brown-ish handle under viewer's turquoise one? That will give you the tile representing the object. Also, from the viewer's menu, you can choose 'tile representing me'.

Another question: after writing the behavior of the red turtle population, there is a way to copy the same for the blue turtle population or need I to rewrite it again?

The answer is.... yes, you have to. Sorry about that.

-- Yoshiki