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Create a radial stimulus that looks like moving forward

Hello,

I am trying to create a radial stimulus that looks like moving towards or away from the person who is viewing the screen. With visual.radialstim, I was able to create a radial stimulus with moving circular gratings of the same width, but it does not look like moving either forward for backward. Is there a way to create such a stimulus? I tried with visual.windowwrap, but did not get any success yet.

Appreciate it for any help provided!
Yu

Like this?

Yes! Thank you Micheal :slight_smile: