pseudo random list of ISI

My experiment is composed of sequences of 40 images separated by a fixed set of different interstimulus intervals; each sequence has different images, but I want the same interstimulus intervals for each sequence. Is it possible to avoid adding by hand 800 events [10 sequences x 40 (Images + ISI)] ?
Any help is greatly appreciated!

Yes. You need to use the stimulus lists feature. Each trial would consist of 80 events (40 images + 40 ISI). The image events would need to use a stimulus list, and each list would have 10 images in it.

Let me know if you need more help.

resolved, thanks