# Create a radial stimulus that looks like moving forward
**URL:** https://discourse.psychopy.org/t/create-a-radial-stimulus-that-looks-like-moving-forward/8840
**Category:** Coding
**Created:** [August 21, 2019, 4:19pm UTC](https://discourse.psychopy.org/t/create-a-radial-stimulus-that-looks-like-moving-forward/8840 "2019-08-21T16:19:02Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@tang232](https://discourse.psychopy.org/u/tang232)
#### Post date: [August 21, 2019, 4:19pm UTC](https://discourse.psychopy.org/t/create-a-radial-stimulus-that-looks-like-moving-forward/8840/1 "2019-08-21T16:19:02Z")
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
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### Author:  [@Michael](https://discourse.psychopy.org/u/Michael)
#### Post date: [August 22, 2019, 2:40am UTC](https://discourse.psychopy.org/t/create-a-radial-stimulus-that-looks-like-moving-forward/8840/2 "2019-08-22T02:40:25Z")
Like this?
> [@Zooming In/Out of Stimuli](https://discourse.psychopy.org/t/zooming-in-out-of-stimuli/8825):
>
> I’m programming a variation of an approach/avoid task in which after participants have made a response, the stimuli either increases or decreases in size. I have an idea of how I might do this based on a key press, but I’d like the stimuli to change size after a certain duration of time has passed instead of the key press (to ensure continuity). I was wondering if anyone has done this before or has any advice?
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### Author:  [@tang232](https://discourse.psychopy.org/u/tang232)
#### Post date: [October 2, 2019, 7:57pm UTC](https://discourse.psychopy.org/t/create-a-radial-stimulus-that-looks-like-moving-forward/8840/3 "2019-10-02T19:57:29Z")
Yes! Thank you Micheal 🙂