I’m fairly new to PsychoPy3 and try to create my first visual search experiment with the builder. So far so good, I’ve added all the relevant stimuli I need. However, I need to make the background flicker (change rapidly between black and white): In one block, with 10 Hz, in another block, with 20 Hz.
Any ideas how to achieve this? I could only implement uniform backgrounds but no changes.
Best regards and many thanks,