| Reference | Downloads | Github

Circle stimulus

If this template helps then use it. If not then just delete and start from scratch.

OS (e.g. Win10): Win 10
PsychoPy version (e.g. 1.84.x): v3.0.6
Standard Standalone? (y/n) If not then what?: Yes
What are you trying to achieve?: To create a using PsychoPy Builder

What did you try to make it work?: I am not sure how to do this.

What specifically went wrong when you tried that?:
Include pasted full error message if possible. “That didn’t work” is not enough information.

Insert a Polygon component and select the “regular polygon” shape option. Give it a sufficiently large number of vertices so that looks like a smooth circle, rather than having visible straight sides.