Running Experiment with Conditional loop for Serial Port

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

OS (MacOS 13.5):
PsychoPy version (Latest):
**Standard Standalone? (y)
What are you trying to achieve?:
Creating an experiment with a loop that has conditioned input for a serial port stimulus. Showing a picture every few seconds and expect a biosensor to record the data whenever the image has been shown.

What did you try to make it work?:
I tried to create this experiment using Builder, I uploaded pictures for this experiment to this post.

What specifically went wrong when you tried that?:
the experiment starts, but it only shows the first picture and then the page goes blank with nothing on it. it doesn’t get terminated due to error or anything else either. Not sure how I can have all the pictures shown to the participants. Appreciate any help with this.