Pocholo, Thanks for your new plug-in.

Nice!

@ Issabella: Thank you for your comment and for testing the plugin. I love the cylinder shape concept. If you don't mind, I will like to implement the plugin with your Idea.

@Rod: Thanks for the the, Nice! expression.

Yes, of course. It's a nice effect. I used Rectangle to Circle by Tin.

Theilr- Pan to Rainbow shape. (will also do 360)

Thank you for the script info, Issabella. You can do the same with the G'MIC filter found in, Kaleidoscope [Reptorian-Polar]
That is what I'm going to use since most users have G'MIC, it will save me time by not including a third party script.

This is the result with G'MIC

Great! Good idea and thanks for your plug-ins.

You're re-inventing the wheel

Filters > Map > Recursive transform not only does exactly what your script do but does have more options...

You are right, Patrice ahh... but my script have a name. My script have Colors, Noise, and a Round shape .
Coders create codes to automate what other users can do manually using GIMP resources, like the same "Gegl Recursive Transform plugin" you used. For example; there is a few bevel scripts around, maybe you have one like "Select Bevel, GT Bevel, Add bevel. "But I can do what those script can do manually". Then again, whoever wrote the scripts try to make it easier (for other users like you and me), so we don't have to make our effects manually using that many plugins or steps,. Now we have it at a touch of one button.
Anyway, thank you for your information.

Pocholo, BTW, thanks a lot for mentioning the G'MIC filter, I always over looked at this Reptorian's filter, and today trying it, that's a cool one