Thanks a lot, it worked! I am very new to both PsychoPy and Pavlovia
I have another question, if I may:
How can I implement the fill color and text color change when the mouse hovers over the polygon?
I used this solution Changing line colour with mouseover [Javascript] - #4 by wakecarter
and added code to the trial after the sound is presented, to the beginning of a routine, as well as the color definitions from the crib sheet. It does not work in PsychoPy or online.
Thank you in advance!